#include <bits/stdc++.h>   using namespace std;   int main() {     int n, k, x;     vector<int> a;     cin >> n >> k;     vector<int> w(k);     for (int i = 0; i < n; i++) {       cin >> x;       a.push_back(x);     }     for (int i = 0; i < k; i++) {       for (int j = i; j < n; j += k) {         w[i] += a[j];       }     }     int menor = w[0];     int z = 0;     for (int i = 0; i < k; i++)       if (menor > w[i]) {         menor = w[i];         z = i;       }     cout << z + 1 << endl;   }   