Submission #1024989

#	Time	Username	Problem	Language	Result	Execution time	Memory
1024989		joelgun14	Hacker (BOI15_hac)	C++17	0 / 100	1 ms	348 KiB

hac

// header file
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// pragma
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
// macros
#define endl "\n"
#define ll long long
#define mp make_pair
#define ins insert
#define lb lower_bound
#define pb push_back
#define ub upper_bound
#define lll __int128
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_multiset;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
int main() {
  ios_base::sync_with_stdio(0); cin.tie(NULL);
  int n;
  cin >> n;
  ll a[n + 1], pref[n + 1], suff[n + 2];
  pref[0] = suff[n + 1] = 0;
  for(int i = 1; i <= n; ++i)
    cin >> a[i], pref[i] = pref[i - 1] + a[i];
  for(int i = n; i >= 1; --i)
    suff[i] = suff[i + 1] + a[i];
  ll res = 0;
  for(int i = 1; i <= n; ++i) {
    res = max(res, a[i] + min(pref[i - 1], suff[i + 1]));
  }
  cout << res << endl;
  return 0;
}

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