func_code_string: #include <bits/stdc++.h>   using namespace std;   inline void boost() {     ios_base::sync_with_stdio();     cin.tie(0);     cout.tie(0);   }   const long long maxn = 1e5 + 123;   const long long inf = 1e9 + 123;   const long long mod = 1e9 + 7;   const double infm = 1e-9;   const double pi = acos(-1);   int a[maxn];   bool used[maxn];   int main() {     boost();     int n, k;     cin >> n >> k;     int p = 0, m = 0;     for (int i = 1; i <= n; i++) {       cin >> a[i];     }     int mx = 0;     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= n; j++) {         if (abs(j - i) % k == 0) {           used[j] = 1;         }       }       int sum = 0, sum1 = 0;       for (int j = 1; j <= n; j++) {         if (used[j] == 0) {           if (a[j] == 1) {             sum++;           } else {             sum1++;           }         }         used[j] = 0;       }       mx = max(mx, abs(sum - sum1));     }     cout << mx;     return 0;   }   