func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     long long m, k;     scanf( %d%lld%lld , &n, &m, &k);     long long a[n], asum[n + 1];     asum[0] = 0;     for (int((i)) = (0); ((i)) < ((n)); ++((i))) {       scanf( %lld , &a[i]);       asum[i + 1] = asum[i] + a[i];     }     long long dp[m];     for (int((i)) = (0); ((i)) < ((m)); ++((i))) dp[i] = 1e18;     long long ans = 0;     for (int((i)) = (0); ((i)) < ((n)); ++((i))) {       dp[i % m] = min(dp[i % m] + k, asum[i] + k);       for (int((j)) = (0); ((j)) < ((m)); ++((j)))         ans = max(ans, asum[i + 1] - dp[j]);     }     printf( %lld n , ans);   }   