func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e5 + 10;   int n, k;   int a[200];   int main() {     ios::sync_with_stdio(false);     cin >> n >> k;     int e = 0, s = 0;     for (int i = 1; i <= n; i++) {       cin >> a[i];       if (a[i] == 1)         e++;       else         s++;     }     int ee = e, ss = s;     int ans = -1;     for (int b = 1; b <= k; b++) {       ee = e;       ss = s;       for (int i = 0; b + i * k <= n; i++) {         int c = b + i * k;         if (a[c] == 1)           ee--;         else           ss--;       }       ans = max(ans, abs(ee - ss));     }     printf( %d n , ans);     return 0;   }   