Number of Credits Codechef Solution

Hello coders, today we are going to solve Number of Credits Codechef Solution whose Problem Code is CREDS.

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Number of Credits Codechef Solution
Number of Credits Codechef Solution

Number of Credits Codechef Solution


Chef has a binary string S. He can modify it by choosing any subsequence of length 3 from it and deleting the first and last character of the subsequence.

For example, if S = textcolor{red}{11}01textcolor{red}{0}1S=110101, Chef can choose the subsequence marked in red and delete its first and last characters, obtaining the string S = 1011S=1011.

Chef wonders what is the lexicographically largest string he can obtain by modifying the original string using a finite number of operations. Please help Chef in this task.

Note: A binary string AA is said to be lexicographically larger than another binary string BB if:

  • BB is a proper prefix of AA (for example, 101101 is lexicographically larger than 1010); or
  • There exists an index ii such that A_1 = B_1, A_2 = B_2, ldots, A_{i-1} = B_{i-1}A1​=B1​,A2​=B2​,…,Ai−1​=Bi−1​ and A_i gt B_iAi​>Bi.

Input Format

  • The first line of input will contain a single integer TT, denoting the number of test cases.
  • Each test case consists of a single line of input containing the original binary string SS.

Output Format

For each test case, output on a new line the lexicographically largest string Chef can obtain.


  • 1 leq T leq 2cdot 10^41≤T≤2⋅104
  • 3 leq |S| leq 10^53≤∣S∣≤105
  • SS is a binary string, i.e, only contains the characters 00 and 11 in it
  • The sum of |S|∣S∣ over all test cases won’t exceed 3cdot 10^53⋅105.

Sample 1:





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Test case 11: It is optimal to not perform any moves.

Test case 22: In one move, by choosing the subsequence 1textcolor{red}{010}1010, the string can be made into 1111, which is the lexicographically largest possible.

Test case 33: It is optimal to not perform any move.

Number of Credits Codechef Solution in CPP

#include <iostream>
using namespace std;
int main() {
	// your code goes here
	int t;
	    int x,y,z;
	    int a=x*4;
	    int b=y*2;
	return 0;

Number of Credits Codechef Solution in JAVA

/* package codechef; // don't place package name! */
import java.util.*;
import java.lang.*;
/* Name of the class has to be "Main" only if the class is public. */
class Codechef
	public static void main (String[] args) throws java.lang.Exception
	 Scanner Sc=new Scanner(;
	    int T= Sc.nextInt();
	     for(int i=1;i<=T;i++){
	     int X= Sc.nextInt();
	     int Y= Sc.nextInt();
	     int Z= Sc.nextInt();
	     System.out.println(4*X+ 2*Y + 0*Z);

Number of Credits Codechef Solution in Python

# cook your dish here
for i in range(T):
    x,y,z=map(int,input().split(' '))

Disclaimer: The above Problem (Number of Credits) is generated by CodeChef but the solution is provided by  Chase2learn.This tutorial is only for Educational and Learning purpose.

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