Submission #1276331

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276331		vk3601h	Hacker (BOI15_hac)	C++20	100 / 100	388 ms	18060 KiB

hac

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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int n;
    cin >> n;

    vector<int> values(2 * n + 1);
    values[0] = 0;
    for (int i = 1; i <= n; i++){
        cin >> values[i];
        values[n + i] = values[i];
    }
    for (int i = 1; i <= 2 * n; i++) values[i] += values[i - 1];

    int win_size = (n + 1) / 2;
    multiset<int> totals;
    vector<int> res(n + 1, INT_MAX);
    for (int i = 1; i <= 2 * n; i++){
        if (i + win_size - 1 <= 2 * n) totals.insert(values[i + win_size - 1] - values[i - 1]);
        if (i > win_size) totals.erase(totals.find(values[i - 1] - values[i - 1 - win_size]));
        int real_pos = (i - 1) % n + 1;
        res[real_pos] = min(res[real_pos], *totals.begin());
    }

    int ans = 0;
    for (int i = 1; i <= n; i++) ans = max(ans, res[i]);
    cout << ans;

    return 0;
}

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