太水了没发到学术

$evaluating \quad link$

#include <bits/stdc++.h>
using namespace std;
int n,m,a[3003],mi;
int main() {
    cin >> n >> m; mi = INT_MAX;
    for(int i = 1; i <= n; i++)
        cin >> a[i]; int k = 0;
    for(int i = 1; i <= n-m+1; i++){
       for(int j = 1; j <= m; j++)
           k += a[i+j-1];
        if(k < mi) mi = k;
        k = 0;
    }
    cout << mi << endl;
    return 0;
}