func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 2;   int n, l;   long long a[N], f[N];   int main() {     scanf( %d %d , &n, &l);     for (int i = 1; i < n; ++i) scanf( %lld , &a[i]), a[i] += a[i - 1];     long long ans = LLONG_MAX;     for (int i = l; i < n; ++i) ans = min(ans, a[i] - a[i - l]);     printf( %lld n , ans);     return 0;   }   