Submission #1245691

#	Time	Username	Problem	Language	Result	Execution time	Memory
1245691		lopkus	Hacker (BOI15_hac)	C++20	20 / 100	69 ms	12100 KiB

hac

#include <bits/stdc++.h>

#define int int64_t

signed main() {
  int n;
  std::cin >> n;
  std::vector<int> a(n + 1);
  for(int i = 1; i <= n; i++) {
    std::cin >> a[i];
  }
  std::vector<int> pref(n + 1), suff(n + 2);
  for(int i = 1; i <= n; i++)
    pref[i] = pref[i - 1] + a[i];
  for(int i = n; i >= 1; i--)
    suff[i] = suff[i + 1] + a[i];
  int ans = 1e18;
  int k = (n + 1) / 2;
  for(int i = 1; i <= k; i++) {
    ans = std::min(ans, pref[i] + suff[i - k + n + 1]);
  }
  std::cout << ans;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 40