题解

#include<bits/stdc++.h>
using namespace std;
int n,m,a[3005];
int ans = INT_MAX;
int main(){
    cin>>n>>m;
    for(int i = 1;i<=n;i++) cin>>a[i];
    for(int i = 1;i<=n;i++){
        int num = 0;
        if(i+m-1>n) break;
        for(int j = i;j<=i+m-1;j++){
            num+=a[j];
        }
       ans = min(ans,num);
    }
    cout<<ans;
}