19 lines
408 B
C++
19 lines
408 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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const int N=3010;
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const int INF=0x3f3f3f3f;
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typedef long long LL;
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int a[N];
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LL MIN = INF;
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int main() {
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int n,m;
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cin>>n>>m;
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for (int i = 1; i <= n; i++) cin>>a[i];
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for (int i = 1; i <= n-m+1; i++) {
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LL sum =0;
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for (int j = 1; j < m; j++) sum+=a[i+j];
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MIN=min(MIN,sum);
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}
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cout<<MIN;
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return 0;
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}
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