Submission #882066

#	Time	Username	Problem	Language	Result	Execution time	Memory
882066		12345678	Hacker (BOI15_hac)	C++17	100 / 100	72 ms	18664 KiB

hac

#include <bits/stdc++.h>

using namespace std;

const int nx=5e5+5;
int n, qs[2*nx], v[nx], res;
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n;
    int sz=(n+1)/2;
    for (int i=1; i<=n; i++) cin>>v[i];
    for (int i=1; i<=2*n; i++) qs[i]=qs[i-1]+v[i>n?i-n:i];
    for (int i=sz; i<2*sz; i++) pq.push({qs[i]-qs[i-sz], i-sz});
    for (int i=sz; i<n+sz; i++)
    {
        while (pq.top().second<i-sz) pq.pop();
        res=max(res, pq.top().first);
        pq.push({qs[i+sz]-qs[i], i});
    }
    cout<<res;
}

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