Skip to main content

Team Name codechef February 2021 long challenge editorial Full solution with code

 Team Name codechef  February 2021  long challenge editorial Full solution with code-

Problem Statement-

Team Name codechef  February 2021  long challenge editorial Full solution with code

–°hef has assembled a football team! Now he needs to choose a name for his team. There are N words in English that Chef considers funny. These words are s1,s2,,sN.

Chef thinks that a good team name should consist of two words such that they are not funny, but if we swap the first letters in them, the resulting words are funny. Note that under the given constraints, this means that a word is a non-empty string containing only lowercase English letters.

Can you tell Chef how many good team names there are?


  • The first line of the input contains a single integer T denoting the number of test cases. The description of T test cases follows.
  • The first line of each test case contains a single integer N.
  • The second line contains N space-separated strings s1,s2,,sN.


For each test case, print a single line containing one integer — the number of ways to choose a good team name.


  • 1T100
  • 2N2104
  • 2|si|20 for each valid i
  • s1,s2,,sN contain only lowercase English letters
  • s1,s2,,sN are pairwise distinct
  • the sum of N over all test cases does not exceed 2104


Subtask #1 (20 points): s1,s2,,sN contain only letters 'a' and 'b'

Subtask #2 (80 points): original constraints

Example Input

suf mas
good game guys
hell bell best test

Example Output



Example case 1: The good team names are ("muf", "sas") and ("sas", "muf").

Example case 2: There are no good team names because all funny words start with 'g'.

Example case 3: The good team names are ("hest", "tell") and ("tell", "hest").



make a map of string and vector and insert key as rest of string except head and value as head of the string.

Solution will be posted anytime soon stay connected in telegram for update-
Must join Telegram channel - 


Popular posts from this blog

Vaccine Distribution Codechef December Long challenge solution 2020

 Vaccine Distribution  Codechef December Long challenge solution 2020- This Problem vaccine distribution is taken from December long challenge 2020. lets read problem statement. Problem statement- Finally, a COVID vaccine is out on the market and the Chefland government has asked you to form a plan to distribute it to the public as soon as possible. There are a total of  N N  people with ages  a 1 , a 2 , … , a N a 1 , a 2 , … , a N . There is only one hospital where vaccination is done and it is only possible to vaccinate up to  D D  people per day. Anyone whose age is  ≥ 80 ≥ 80  or  ≤ 9 ≤ 9  is considered to be  at risk . On each day, you may not vaccinate both a person who is at risk and a person who is not at risk. Find the smallest number of days needed to vaccinate everyone. Input The first line of the input contains a single integer  T T  denoting the number of test cases. The description of  T T  test cases follows. The first line of each test case contains two space-separ

Codechef February long challenge solution 2021

   Codechef February  long challenge solution 2021- Hey guys Welcome Again, A small update CodeChef February  long challenge solution 2021 starting from 1st week of beb  2021 . Codechef long challenge is one of the popular contests of CodeChef you should participate in codechef Feb  long challenge.This is first contest of codechef in 2021 so good luck. And wish you happy new year. Contest link- I will post the solution after Contest.Stay tuned. About CodeChef  February  long challenge solution 2021: CodeChef Long Challenge is a 10-day monthly coding contest where you can show off your computer programming skills. The significance being - it gives you enough time to think about a problem, try different ways of attacking the problem, read the concepts etc. If you’re usually slow at solving problems and have ample time at hand, this is ideal for you. We also put in a lot of efforts in getting quality problems, w

Merge Two sorted array Without Extra Space

Problem statement-  Given two sorted arrays arr1[] and arr2[] of sizes N and M in non-decreasing order. Merge them in sorted order without using any extra space. Modify arr1 so that it contains the first N elements and modify arr2 so that it contains the last M elements.    Example 1: Input:  N = 4, arr1[] = [1 3 5 7]  M = 5, arr2[] = [0 2 6 8 9] Output:  arr1[] = [0 1 2 3] arr2[] = [5 6 7 8 9] Explanation: After merging the two  non-decreasing arrays, we get,  0 1 2 3 5 6 7 8 9.   Example 2: Input:  N = 2, arr1[] = [10, 12]  M = 3, arr2[] = [5 18 20] Output:  arr1[] = [5 10] arr2[] = [12 18 20] Explanation: After merging two sorted arrays  we get 5 10 12 18 20. Your Task: You don't need to read input or print anything. You only need to complete the function merge() that takes arr1, arr2, N and M as input parameters and modifies them in-place so that they look like the sorted merged array when concatenated. Expected Time Complexity:  O((n+m) log(n+m)) Expected Auxilliary Space: O(1