func_code_string: #include<bits/stdc++.h>   using namespace std;   #define ll long long   #define endl   n    #define pb push_back   const ll INF=1e18+10;      void solve()   {       ll n,m;       cin>>n>>m;       string s;       cin>>s;       string p=s;       while(m--)       {           s=p;           for(ll i=0;i<n;i++)           {               if(p[i]== 1 ) continue;               else{               if(i==0)               {                  // cout<< YES <<endl;                   if(s[i+1]== 1 ) p[i]= 1 ;                   else p[i]= 0 ;                   //cout<<p[i]<<endl;               }              else if(i==n-1)               {                   if(s[i-1]== 1 ) p[i]= 1 ;                   else p[i]= 0 ;               }               else               {                   if((s[i-1]== 1 &&s[i+1]== 0 )||(s[i+1]== 1 &&s[i-1]== 0 )) p[i]= 1 ;                   else p[i]= 0 ;               }           }           }           if(p==s) break;       }          cout<<p<<endl;      // cout<<p[0]<<endl;      }   int main()   {       ios::sync_with_stdio(0);       cin.tie(0);       ll t;       t=1;      cin>>t;       while(t--)       {           solve();       }   }   