Submission #917376

#	Time	Username	Problem	Language	Result	Execution time	Memory
917376		theghostking	Hacker (BOI15_hac)	C++17	0 / 100	1 ms	348 KiB

hac

#include <bits/stdc++.h>
using namespace std;

#define int long long

signed main() {
    int n;
    cin >> n;
    vector<int> a(3*n);
    for (int i = 0; i<n; i++){
        cin >> a[i];
        a[n+i] = a[i];
        a[n+n+i] = a[i];
    }
    int N = 3*n;
    vector<int> pref(N+1);
    for (int i = 1; i<=N; i++){
        pref[i] = pref[i-1] + a[i-1];
    }
    int tgt = (n+1)/2;
    int ans = 0;
    for (int i = n; i<2*n; i++){
        int one = pref[i+tgt-1]-pref[i-1];
        int two = pref[i]-pref[i-tgt];
        ans = max(ans, min(one,two));
    }
    cout << ans;
    return 0;
}

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