func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     int t;     cin >> t;     while (t--) {       long long int n, i, j, k, l, sum = 0, g = 0, sum1 = 0, q, one, zero, k1;       cin >> n >> k1;       string s;       cin >> s;       for (i = 0; i < k1; i++) {         k = i;         q = 0;         zero = 0, one = 0;         while (k <= n - 1) {           if (s[k] ==  ? )             q++;           else if (s[k] ==  1 )             one++;           else             zero++;           k += k1;         }         if (one != 0 && zero != 0) {           g = 1;           break;         } else if (zero != 0) {           k = i;           while (k <= n - 1) {             s[k] =  0 ;             k += k1;           }         } else if (one != 0) {           k = i;           while (k <= n - 1) {             s[k] =  1 ;             k += k1;           }         }       }       for (i = 0; i < k1; i++) {         if (s[i] ==  1 )           sum++;         else if (s[i] ==  ? )           sum1++;       }       if (sum > k1 / 2)         g = 1;       else if (sum < (k1 / 2) && sum1 < ((k1 / 2) - sum))         g = 1;       if (g == 1)         cout <<  NO               <<   n ;       else         cout <<  YES               <<   n ;     }     return 0;   }   