func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, ans, final = 0, play = 0, study = 0, big, small, i, j;     cin >> n >> m;     int a[n + 1];     for (i = 1; i <= n; i++) {       cin >> a[i];       if (a[i] == 1) {         study++;       } else {         play++;       }     }     for (i = 1; i <= m; i++) {       j = i;       big = study;       small = play;       while (j <= n) {         if (a[j] == 1) {           big--;         } else {           small--;         }         j += m;       }       ans = abs(big - small);       if (ans > final) {         final = ans;       }     }     cout << final;   }   