codechef-Questions/DNASTORAGE.cpp at master · HarshTanwar143/codechef-Questions · GitHub

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/*For encoding an even-length binary string into a sequence of A, T, C, and G, we iterate from left to right and replace the characters as follows:

00 is replaced with A
01 is replaced with T
10 is replaced with C
11 is replaced with G
Given a binary string
�
S of length
�
N (
�
N is even), find the encoded sequence*/


#include<bits/stdc++.h>
using namespace std;

int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n;
        cin>>n;
        char st[n];
        cin>>st;
        for(int i = 0;i<n;i=i+2)
        {
            if(st[i]=='0' && st[i+1]=='0')
            cout<<'A';

            else if(st[i]=='0' && st[i+1]=='1')
            cout<<'T';

            else if(st[i]=='1' && st[i+1]=='0')
            cout<<'C';

            else if(st[i]=='1' && st[i+1]=='1')
            cout<<'G';

        }
        cout<<endl;
    }
}