Answer:
#include <iostream>
#include <vector>
using namespace std;
void swapfrontend(vector<int> &v)
{
int temp = v[0];
v[0] = v[v.size() - 1];
v[v.size() - 1] = temp;
}
int main()
{
vector<int> v;
int num;
cout << "Enter numbers to be inserted in the vector, then enter -1 to stop.\n";
cin >> num;
while (num != -1)
{
v.push_back(num);
cin >> num;
}
swapfrontend(v);
cout << "Here are the values in the vector:\n";
for (int i = 0; i < v.size(); i++)
cout << v[i] << endl;
return 0;
}
you need to determine the priority of several processes. which command should you enter to identify the process id and nice value for each process?
The command you must enter to identify the process ID and the nice value of each process is the top command.
Since, the top command is used to display the resource usage of all processes running on a system. Such as:
The process ID (PID)User ID (UID)CPU usageMemory usagePriority (nice value)The command being executedWhat are the commands in a process ID?Ps: Display information about currently running processes.Top: Display information about all running processes.Kill: Terminate a process by its process ID.Nice: Change the priority of a process.Renice: Change the priority of an already running process.Strace: Trace system calls and signals for a process.Isof: List open files for a process.Itrace: Trace library calls for a process.Pmap: Display memory usage information for a process.Gdb: Debug a process by its process ID.Learn more about the commands in a process ID:
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in an erlang loss model, customers who arrive when all servers are busy are lost to the system. group of answer choices true false
In an Erlang loss model, customers who arrive when all servers are busy are lost to the system is true.
What is the Erlang loss model definition?The first publication of Erlang's M/M/C/C queue, or Erlang loss model, was in 1917 . It simulates a scenario where calls are received at a phone exchange using a Poisson process with rate, call holding durations are exponentially distributed with mean, and C lines are available.
Therefore, Erlang loss model assumes that each client is handled by a single server and that clients do not have to wait. Hence, the statement above is correct.
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write a method contains() that returns true if the key is stored in the array values. the key is stored using closed hashing with linear probing method and uses keytoindex() as the hash function. (keytoindex() is already defined and provided for you). linear probing means that when we have a collision, we check the next (hence linear) position to see if the key is there (probing). we continue until we find they key or find an empty slot (null) in values. The details of the algorithm are:
Compute the index for the key by calling keyToIndex().
If position index in values is empty (i.e. null) then the key is not found and we return false.
If position index is in use (i.e., not null) then we compare the key with the value stored at index. If they are the same, then the key exists and we return true.
Otherwise, the position index is in use and the key stored there is not the same as the key being searched. This is a collision and we must resolve it using linear probing. Increment the index returned by keyToIndex() by one and check the next position. Continue doing this until either you find a position with the key already stored (return true) or you find an empty position (return false). When you increment index, make sure you wrap it around the end of the values table using the remainder (modulo) so that you check all possible positions.
boolean contains(String key, String values[])
{
int index = keyToIndex(key);
<< your code here >>
Boolean includes (String key, String values[]) <your code here>: int index = keyToIndex(key);.
A technique called hashing is used to distinguish one particular object from a collection of related ones. Let's say a key is given to an item to make searching easier. One can use a straightforward array akin to a data structure to store the key/value combination, where keys (integers) can be used directly as an index to store values.
Hashing should be employed, nevertheless, when the keys are big and cannot be utilized as an index directly. During hashing, hash functions are used to break up huge keys into smaller ones. The values are then kept in a hash table, a type of data structure. Using linear probing the hashing method might be used to produce an array index that has already been used. If this is the case, we can look into each subsequent cell in the array until we discover one that is empty. This method is known as linear probing.
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Why was Tesla coil an invention
write the definition of an exception class named panicexception that does not have its own error message
Coding faults and flaws are quite common. The truth is that even the greatest code is rarely error-free, despite the fact that extremely well-written programs might claim to have fewer problems.
What class named panic exception own error message?Additionally, when features are added, code is modified, it is updated, and refactored, flaws can sneak into the code. Minor mistakes cause hiccups during program execution, although they don't necessarily result in a system crash.
Therefore, But that does not imply that they are not serious. In fact, if those issues are not resolved, they may end up being more dangerous in the long term.
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Which council was designed to streamline the processing of information regarding issues of national security?.
The National Security as revised by the National Security Act Amendments of 1949, created the National Security Council (NSC) to streamline the processing of information regarding issues of national security
The President typically discusses national security and foreign policy issues with his top national security advisers and cabinet members at the National Security Council (NSC). The Council's role has been to advise and assist the President on matters of national security and foreign policy ever since it was established by President Truman. The Council also acts as the President's main tool for liaising between various government entities to implement these policies.
The President serves as the NSC's chair.The Assistant to the President for National Security Affairs, the Vice President, the Secretary of State, the Secretary of the Treasury, the Secretary of Defense, and others regularly attend (both statutory and non-statutory). The official military advisor to the Council is the Chairman of the Joint Chiefs of Staff, while the official intelligence advisor is the Director of National Intelligence.
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you want to get a quick overview of what the disks and filesystems mounted on your system to have for free and used space. which of the following would give you this information?
df -ht is the statement that will help me to know the quick view of the disks and file systems.
What is df - ht?
Show the disc space use in an understandable format for humans.
The disc space is shown in a human-readable format using the '-h' option. The size will be shown in powers of 1024, with G for gigabytes, M for megabytes, and B for bytes appended. Run the df -h command as shown below.
So the df is the disk free which also is about the file system so df - ht combined means to help the viewers view the free disk space as well as the file systems in the human-readable format
Thus, we can conclude that df - ht is the disk storage command to give in the command line to know the hard disk space
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a customer called derek to complain that her computer was running slow, so he went to the client work area and started troubleshooting the problem. derek ran the disk defragmenter and disk clean-up utilities. he checked the processes running in task manger.
Checking the computer's system resources, such as CPU usage, memory usage, and disk usage, to see if any of these resources are heavily taxed or running low.
What is Troubleshooting?Troubleshooting is the process of identifying and solving problems or issues. It is a systematic approach to problem-solving that involves identifying the problem, gathering information, analyzing the data, and developing and implementing solutions.
Troubleshooting can be applied to a wide range of situations, from technical problems with computers or other equipment, to operational problems in organizations or systems.
The goal of troubleshooting is to quickly and effectively resolve problems and restore normal operation, so that the affected system or process can continue to function properly.
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computer 1 on network b, with ip address of 192.168.1.233, wants to send a packet to computer 2, with ip address of 10.1.1.205. on which network is computer 2?
IP address of 10.1.1.205. on computer2. i.e. computer two is connected with subnet.
What IP address means?Internet Protocol address is referred to as an IP address. A set of guidelines known as the Internet Protocol governs online interactions such as sending email, streaming video, and connecting to websites. On the internet, a network or device is identified by its IP address.Select the network you are currently connected to by going to your WiFi network settings. Your IP address may be found alongside the other network details.An IP address range is all that a subnet is. Without using any routers, all the devices on the same subnet may connect with one another directly. A network interface in IPv4 only connects to one subnet and has a single IP address.
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Denise is working on a report in an Access file, as shown below.
Denise would like to print the report as "Relationships for Orders2.” Which steps should Denise follow to complete this task?
a. She should click on the Design View icon and click Print.
b. She should click the Print icon, select the printer, and click OK.
c. She should click on the Design View icon, select the printer, and click OK.
d. She should click the Print icon, click OK, save the file, and click Print.
Since Denise would like to print the report as "Relationships for Orders2.” The steps that Denise follow to complete this task is option b. She should click the Print icon, select the printer, and click OK.
Where is my print icon?Input Ctrl+P. The Print dialog box for the program can appear as a result. A print icon or button should be found. The majority of the time, app developers provide a print icon or button on the screen.
Note that Any screen can be chosen and fit to a page to be sent to a printer for printing or to be saved as a PDF file using the print feature.
Therefore, the way you can get a desktop icon for printer is by>
Go to the Devices and Printers area in Control Panel after opening it.Create a shortcut by doing a right-click on your printer.Windows prompts you to create a shortcut on your desktop since it was unable to create one in the Control Panel.You can find the printer shortcut or icon on your desktop.Learn more about printing from
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what is a data collector set, and what are the three basic types of data collection tools and formats?
Answer:
A set of strategies for gathering performance and diagnostic data and presenting it in a report or log style. The fundamental data collection approaches can include one or more of the following: performance counters, event traces, and system configuration data.
Performance counters and performance counter reports, traces and trace reports, and system configuration data are the three basic types.
Suppose when a crash occurred, the log in the stable storage has the following records in the given order (where T1, T2 and T3 represent different transactions):
,,,,,,,,
(a) If the deferred database modification recovery technique is used, what should be done to T1, T2 and T3 (the choices are "no action", "redo" and "undo")? Before the crash, what are the values of A, B, and D as can be seen by other database users with access privilege? After the recovery is completed, what are the values of A,B and D in the database? (b) If the immediate database modification recovery technique is used and the real database is updated as soon as possible (assume that for all log records in the stable storage, the corresponding changes have been made to the real database), what should be done to T1, T2 and T3? Before the crash, what are the values of A, B, and D as can be seen by other database users with access privilege? After the recovery is completed, what are the values of A,B and D in the database?
Databases crash because
Low Maintenance On Pre-Deployment ScriptsThe Database Is On The Wrong ServerUnfriendly Application and QueriesHardware and Software FailuresRunning Out Of Memory and Swap SpaceExplanation in detail:
A database may appear ideal if such a complex setup runs flawlessly 24 hours a day, seven days a week, but that is not the case with a system or database administrator. The reason is straightforward, and software and hardware networks are not fault-proof.
The internal and external environments are constantly changing. In essence, new software is introduced, and existing software is updated. Database growth, memory consumption, log files and caches, growing buffers, and all of the challenges associated with a dynamic environment are all related to a database.
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the entries in a $3 \times 3$ array include all the digits from 1 through 9, arranged so that the entries in every row and column are in increasing order. how many such arrays are there? (a) 18 (b) 24 (c) 36 (d) 42 (e) 60
There are 42 such arrays there.
What do you mean by arrays?
In computer programming, a data structure called an array of arrays contains further arrays at each index. As a result, each sub-initial array's datum element is actually the datum located at each sequential address in the topmost level array.
When utilizing several variables, it might be confusing to keep big collections of data under one variable name. Arrays help prevent this. Data elements' organization: You may efficiently and clearly organize diverse data pieces using various array algorithms, such as bubble sort, selection sort, and insertion sort.
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ashley is taking a test that asks her to think of various ways to use silverware. she is likely taking a test that requires:
Any hand-held tool used for eating or serving food is considered cutlery. Numerous spoons, forks, knives, and tongs are included. It is also known as flatware or silverware.
What various ways to use silverware?Eating with one's hands is customary across most of the world, including major portions of the Middle East, Africa, South Asia, and South America, even though silverware is fundamental to Western dining.
Therefore, The “American” method is cutting your food with your knife in your right hand and your fork in your left, then setting the knife down and using your right hand to eat with your fork's tines facing up.
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a cloud administrator is migrating services from the on-premises network to the cloud network. what phase of the lifecycle roadmap does this activity fall in?
There are three stages to migrating to the cloud: planning, mid-shift, and go-live. Once the decision has been made that cloud computing is the best solution to address the business difficulties you are facing.
The process of shifting digital company processes to the cloud is known as cloud migration. Similar to a physical move, cloud migration entails moving data, programs, and IT procedures from one data center to another, as opposed to packing up and transporting actual physical items. the CloudEndure Migration Factory should receive wave data import. Get the source servers ready. Check the status of server replication. Migration test, please.
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you want to view how your worksheet will print and make edits to the worksheet in this mode. what is the easiest way to accomplish this?
Since you want to view how your worksheet will print and make edits to the worksheet in this mode. The thing that is the easiest way to accomplish this is to select Page Layout on the bottom of the page in the area of the status bar.
Where is the status bar button for page layout?The three standard worksheet view options are Normal View, Page Layout View, and Page Break Preview. The three buttons are located in the bottom right corner.
Therefore, in regards to your work above, you can see a preview of the data that will appear on the printed when you choose one or more sheets and choose File > Print. Choose the worksheet(s) you want to preview. To access the Preview window and printing options, select File and then click Print. keyboard shortcut Additionally, you can use Ctrl+F2.
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In java, how do I make a scanner class?
Answer:
Scanner input = new Scanner(System.in);
What term was discussed to describe how surgeons use augmented reality, high-definition video, and real-time data readings from medical sensors to control the remote robotic surgical tool?.
A terminology which was discussed to describe how surgeons use augmented reality, high-definition video, and real-time data readings from medical sensors to control the remote robotic surgical tool is telesurgery.
What are the forms of Extended Reality (ER)?In Computer technology, there are four (4) main types of Extended Reality and these include the following:
Virtual RealityMixed RealityHaptic RealityAugmented RealityWhat is telesurgery?In Artificial intelligence, telesurgery is sometimes referred to as remote surgery and it can be defined as a type of technology which avails a surgeon an ability to remotely perform surgery on a patient, especially through the use of high-definition video, real-time data readings, and Augmented Reality (AR).
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which data mining process/methodology is thought to be the most comprehensive, according to kdnuggets rankings?
CRISP-DM methodology is thought to be the most comprehensive, according to kdnuggets rankings.
What is data mining?Analyzing a vast amount of data to find patterns and trends is known as data mining.Businesses can utilize data mining for a variety of purposes, such as figuring out what products or services their customers are interested in purchasing, as well as for fraud and spam filtering.Based on the information users supply or request, data mining systems analyze patterns and connections in data.In order to make money, social media corporations utilize data mining techniques to commodify their users.Since consumers frequently are not aware that data mining is taking place with their personal information, especially when it is used to influence preferences, this use of data mining has come under fire recently.To learn more about data mining, refer to
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if you wanted to gain insights into the organic search queries that are taking users to your website, which platform should you connect with analytics?
Go ogle Search Console is the platform you should connect with analytics to gain insights into the organic search queries that are taking users to your website.
What is organic search?
Organic search results in web search engines are those that are determined solely by algorithms and unaffected by advertiser payments. Whether they are explicit pay-per-click advertorials, shopping results, or even other results in which the search engine is compensated for either showing the result or for clicks on the result, they have been distinguished from various types of sponsored results. On their search results pages, the search engines Goo gle, Yah oo!, Bin g, Pet al, and Sog ou include advertisements. Advertising and organic results must be distinguished under US law. This is accomplished by using various variations in the page's background, text, link, and/or background colours. A 2004 survey, however, revealed that the majority of search engine users were unable to tell the two apart.
Go ogle Search Console provides detailed reports about your website's search traffic and performance, including information about the organic search queries bringing users to your website.
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the socket on this next motherboard has 906 holes that can hold 906 pins on the processor. which processor brand will fit this socket? what is this socket's contact method? type in the name of the socket.
The processor brand that will fit this socket is FM2+.
The socket's contact method as well as type in the name of the socket are A10-,A8-, and A6-Series of processors. The socket type is contact or AMD FM2+ Socket.What is the socket about?AMD created Socket FM2+, a zero insertion force CPU socket, to connect desktop "Kaveri" and Godavari APUs to the motherboard. With two extra pin sockets, the FM2+ has a somewhat different pin arrangement than Socket FM2.
Therefore, since there is a a micro PGA package with 906 pins. Instead of the FM2+, you can also find this referred to as the Socket FM2b. Compared to the FM2 processor, it features is one that has two extra pins. used with the A10, A8, and A6 CPU series. There are 906 pinholes (PGA) uses AMD Steamroller architecture, and the processor has an integrated graphics controller.
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true or false? in a known-plaintext attack (kpa), the cryptanalyst hs access only to a segment of encrpted data and has no choice as to what that data might be
Yes , it’s true. In a known-plaintext attack (kpa), the cryptanalyst can only view a small portion of encrypted data, and he or she has no control over what that data might be.
The attacker also has access to one or more pairs of plaintext/ciphertext in a Known Plaintext Attack (KPA). Specifically, consider the scenario where key and plaintext were used to derive the ciphertext (either of which the attacker is trying to find). The attacker is also aware of what are the locations of the output from key encrypting. That is, the assailant is aware of a pair. They might be familiar with further pairings (obtained with the same key).
A straightforward illustration would be if the unencrypted messages had a set expiration date after which they would become publicly available. such as the location of a planned public event. The coordinates are encrypted and kept secret prior to the event. But when the incident occurs, the attacker has discovered the value of the coordinates /plaintext while the coordinates were decrypted (without knowing the key).
In general, a cipher is easier to break the more plaintext/ciphertext pairs that are known.
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you want to connect your small company network to the internet. your isp provides you with a single ip address that is to be shared between all hosts on your private network. you do not want external hosts to be able to initiate connections to internal hosts. what type of network address translation (nat) should you implement?
For the purpose of sharing public addresses among numerous private hosts, use Dynamic Network Address Translation (NAT).
Dynamic NAT permits private hosts to connect to the internet but forbids public hosts from initiating connections with private hosts.
A large number of hosts with private IP addresses can share an equal or smaller number of public IP addresses in a dynamic NAT.To link a port number to a request from a private host, the NAT router employs Port Address Translation (PAT).
Although it may appear to be very similar to a Dynamic PAT, the main distinction is that this is a NAT—only the IP address is changing. This means that a single public IP address cannot be used simultaneously by several internal Hosts.
It should be noted that individuals frequently use the phrase "dynamic NAT" when talking about address translation when they really mean "dynamic PAT." Dynamic NAT is rarely utilised in production for the reasons stated above. It is a dynamic PAT if a single IP address is used by numerous internal users and if the port number changes.
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a user reports that she can't connect to a server on your network. you check the problem and find out that all users are having the same problem. what should you do next?
Since the user reports that she can't connect to a server on your network. you check the problem and find out that all users are having the same problem. The thing that you should do next is option B: to Determine what has changed.
How Do You Define Network Server?A network server is a computer built with the purpose of serving as a central repository and aiding in providing other computers on the network with resources such as hardware access, disk space, printer access, etc.
Therefore, on your network, the ways to locate the server are:
Launch the Command Prompt.In the Command Prompt, enter "Tracert" and the website's address.Next to the website's URL, take note of the IP address.In the search bar, paste the IP address.The information page will have the country location listed.Learn more about server from
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See full option below
What should you do next?
- Create an action plan.
- Determine what has changed.
- Established the most probable cause.
- Identify the affected areas of the network.
the following program is supposed to compute only profits (positive earnings) for the first half of the year (6 months). what is logically wrong with the implementation?
The output will be 1 1 1 2 1 4 6. Hence, the output will be 1 1 2 4 5 1 for the second half.
N = 7, and the price is equal to [100 80 60 70 60 75 85].
1 1 1 2 1 4 6 as output
Explanation: Crossing the input span of 100 will result in the span being 1, 80 being less than 100, 1, 60 being less than 80, 1, 70 being more than 60, 2, and so on. The result will therefore be 1 1 1 2 1 4 6.
N = 6, and the price is equal to [10 4 5 90 120 80].
Results: 1 1 2 4 5 1
Explanation: When traversing the input given, the span for 10 will be 1, since 4 is less than 10 and 5 is greater than 4, and the span for 2 and 3.
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You want to implement an authentication method so that different password attacks, like dictionary attacks, brute force attacks, etc., will not result in unauthorized access to the web application hosted by your enterprise. You want to do this by not using any specialized hardware or making any changes to the user's activity during the authentication process. Which of the following methods should you apply? You should implement keystroke dynamics. You should implement fingerprint authentication. You should implement iris scanning. You should implement facial recognition. 10. Sam is working as a cybersecurity expert. An enterprise that manages nuclear powerplants approached Sam's company to install an authentication facility for its employees when they access the nuclear plant. The enterprise is demanding multifactor authentication with high security, lowest false acceptance rate, and lowest false rejection rates. Which of the following authentication methods should Sam apply? PIN and face recognition PIN and gait recognition PIN and fingerprint scanner PIN and password 11. In an interview, you were asked to crack a password and told that the password is a commonly used word. Which of the following methods should you apply? You should perform a brute force attack. You should perform a dictionary attack. You should perform a rule attack. You should perform skimming. 12. You are asked to choose a secure authentication method other than a username and password for the employees to access your enterprise's database. Which of the following should you choose? Gait recognition Smart card authentication Security key authentication Facial recognition
Security key authentication. Biometric authentication uses a user's distinctive biological characteristics to confirm their identification.
As a result, biometrics are currently among the most secure authentication techniques. Knowledge factors, possession factors, inheritence factors, location factors, and behavior factors make up the five basic types of authentication factors. Answering a personal security question is often required for knowledge-based authentication. Passwords, four-digit personal identification numbers (PINs), and one-time passwords are the most common knowledge factor technologies. In order to access a resource like an application, an online account, or a VPN, the user must submit two or more verification factors, which is known as multi-factor authentication (MFA).
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in the event of a duplicate mac address shared by two hosts on a switched network, what statement is accurate?
The hosts will still send and receive traffic, but traffic may not always reach the correct destination.
What is Ibgp route reflection?One way to get rid of the full-mesh of IBGP peers in your network is by using route reflectors (RR). BGP confederations are the alternative strategy.This greatly simplifies our IBGP arrangement, but there is a drawback as well. The route reflector can malfunction. When it comes to IBGP peerings, there is a single point of failure. We can have numerous route reflectors in our network as a solution, of course.Three types of peerings are possible for the route reflector:
neighbouring EBGPIBGP neighbour clientNon-client IBGP neighbourYou must inform the router if the other IBGP router is a client or non-client when configuring a route reflector.To learn more about Ibgp route, refer to
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What is an SI base unit?
A.
an internationally accepted standard used to measure a physical quantity
B.
a unit formed through mathematical operations of accepted international units of measurement
C.
the smallest unit used to measure a physical quantity
D.
any unit that does not belong to the metric system
NEED ANSWERED ASAP
Answer:a
Explanation:
which access feature is used to divide an access database into two files: one file contains the tables of the database and the other file contains the queries, forms, reports, and other database objects.
To split an Access database into two files, utilize the Split Database functionality. The database's tables are contained in the first file, while the second file houses the queries, forms, reporting, and database queries.
Describe a database.
A database is a collection of data organized for quick access, management, and update. In computer databases, information including such sales transactions, customer information, financial data, and product information are often stored as collections of collected data or files. Databases can be used to hold, organize, and access any kind of data. They gather data on people, places, or objects. To enable observation, that information is compiled in one location. Databases can be seen as a well-organized collection of data.
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string word: a string that consists of only lowercase Latin letters Returns int. the number of good subsequences modulo(10 9+7)Constraints -1≤length of word≤10 5- word[i] is in the range [a-z] - Input Format For Custom Testing The first and the only line consists of a string, word. - Sample Case 0 Sample Input For Custom TestingSTDIN abcd FUNCTION → word = "abcd" Sample Output 15 Explanation All of the non-empty subsequences are good subsequences. 2. Good Subsequences A subsequence of a given string is generated by deleting zero or more characters from a string, then concatenating the remaining characters. A good subsequence is one where the frequency of each character is the same. Given a string that consists ofnLatin letters, determine how many good subsequences it contains. Since the answer can be quite large, compute its modulo(10 9+7)Note: An empty subsequence is not a good subsequence. Example word = "abca" A total of 15 non-empty subsequences can be formed from words. The only subsequences that are not good, are "aba", "aca" and "abca" as the frequencies of character "a" is 2 and every other character is 1. The total number of good subsequences=153=12and answer to the above example=12modulo(10 9+7)=12. Function Description Complete the function countGoodsubsequences in the editor below. countGoodsubsequences has the following parameter(s):
Using the knowledge in computational language in python it is possible to write a code that consists of only lowercase Latin letters Returns int.
Writting the code:import bisect
mod = 10 ** 9 + 7
# HELPER FUNCTION:
# Calculating nCr % mod
def ncr(n, r):
# Initializing numerator and denominator to 1
numerator, denominator = 1, 1
# Iterating over [0, r - 1]
for i in range(r):
# Applying mod on each step
numerator = (numerator * (n - i)) % mod
denominator = (denominator * (i + 1)) % mod
# NOTE: modinverse of x and n is equal to mod of (x ^ (n - 2)) and n
return (numerator * pow(denominator, mod - 2, mod)) % mod
def countGoodSubsequences(word):
# Storing the length of the word
n = len(word)
# Building the frequency dictionary for the letters of the word
freqs = dict()
# Iterating over the letter word by word
for letter in word:
# Updating the frequency for that letter
# If there is no value for that letter, add a value of 0
if letter not in freqs:
freqs[letter] = 0
# Then, increment the value corresponding to that letter
freqs[letter] += 1
# Obtains the sorted counts of each letter
counts = sorted(freqs.values())
# Get the length of counts
lens = len(counts)
# Initialize the result to 0
res = 0
# Iterating over the frequencies [1, n]
for i in range(1, n + 1):
# Initializing the number of subsequences where each element has frequency i to 1
freq_i = 1
# bisect_left returns the first index of counts that is greater than or equal to i
# That is, it finds the first frequency that is atleast i
ind = bisect.bisect_left(counts, i)
# Now, for all the elements having frequencies,
# counts_1, counts_2, counts_3 ... such that counts_1, counts_2, counts_3 .... are all greater than or equal to i,
# there are a total of (1 + (counts_1) C (i) * (1 + (counts_2) C (i) ) ...... -1 subsequences, nCr is (n!) / (c! * r!)
# Iterating over [ind, lens) to count the total number of subsequences where each element has frequency i
for j in range(ind, lens):
# Updating freq_i
freq_i *= (1 + ncr(counts[j], i)) % mod
# Applying mod
freq_i %= mod
# Updating res
res += (freq_i - 1)
# Applying mod
res %= mod
return res
# Sample case
print(countGoodSubsequences("abca"))
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