### Digo plays with Numbers

GIVEN BELOW CODE IS FOR INS14C SPOJ OR DIGO PLAY WITH NUMBER SPOJ.

#include <bits/stdc++.h> using namespace std; int main() { int t; scanf("%d",&t); while(t--) { int n,k; char s[1009]; scanf("%d%d",&n,&k); vector<int>one,zero; scanf("%s",s); for(int i=0;i<n;i++) { if(s[i] == 48) zero.push_back(i); else one.push_back(i); } int count=1,j; for(int i=0,j=0;count <= n-k;count++) { if(count&1){ if(i<one.size()) s[one[i++]] = 50; else s[zero[j++]]=50; } else{ if(j<zero.size()) s[zero[j++]] = 50; else s[one[i++]]=50; } } for(int i=0;i<n;i++) if(s[i]!=50) printf("%c",s[i]); printf("\n"); } return 0; }