func_code_string: #include <bits/stdc++.h>   using namespace std;   int N, K;   vector<int> tabs;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cin >> N >> K;     tabs.resize(N);     for (int i = 0; i < N; i++) cin >> tabs[i];     int most = 0;     for (int b = 0; b < N; b++) {       int sum = 0;       for (int i = 0; i < N; i++)         if (i % K != b % K) sum += tabs[i];       most = max(most, abs(sum));     }     cout << most <<   n ;   }   