Submission #1245694

#	Time	Username	Problem	Language	Result	Execution time	Memory
1245694		lopkus	Hacker (BOI15_hac)	C++20	20 / 100	74 ms	19884 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];
  }
  int ans = 0;
  for(int i = 1; i <= n; i++) {
    std::vector<int> b;
    std::vector<int> c(n + 1);
    for(int j = i; j <= n; j++) {
      b.push_back(a[j]);
    }
    for(int j = i - 1; j >= 1; j--) {
      b.push_back(a[j]);
    }
    for(int j = 1; j <= n; j++) {
      c[j] = b[j - 1];
    }
    std::vector<int> pref(n + 1), suff(n + 2);
    for(int j = 1; j <= n; j++) {
      pref[j] = pref[j - 1] + c[j];
    }
    for(int j = n; j >= 1; j--) {
      suff[j] = suff[j + 1] + c[j];
    }
    int mn = 1e18;
    int k = (n + 1) / 2;
    for(int j = 1; j <= k; j++) {
      mn = std::min(mn, pref[j] + suff[j - k + n + 1]);
    }
    ans = std::max(ans, mn);
    break;
  }
  std::cout << ans;
}

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