Submission #1281484

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281484		sopaipilla	Hacker (BOI15_hac)	C++20	100 / 100	233 ms	20000 KiB

hac

#include <bits/stdc++.h>
#define int long long
#define endl "\n"
using namespace std;

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;
    int x[(2*n)+1];
    for(int i=1; i<=n; ++i) {
        cin >> x[i];
        x[i+n]=x[i];
    }
    x[0]=0;
    for(int i=2; i<=(2*n); ++i) x[i]+=x[i-1];
    
    int k=(n+1)/2, ans=0;
    multiset<int> window;
    window.clear();
    for(int i=1; i<=(n+k); ++i) {
        window.insert(x[i+k-1]-x[i-1]);
        if(i>k) {
            window.erase(window.find(x[i-1]-x[i-1-k]));
            ans = max(ans,*window.begin());
        }
    }
    cout << ans << endl;
}

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