Submission #1286196

#	Time	Username	Problem	Language	Result	Execution time	Memory
1286196		harryleee	Art Exhibition (JOI18_art)	C++20	100 / 100	130 ms	15956 KiB

art

#include<bits/stdc++.h>
using namespace std;
int n;
pair<long long, long long> a[500001];
long long pre1[500001], pre2[500001];

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> a[i].first >> a[i].second;
    sort(a + 1, a + n + 1);

    for (int i = 1; i <= n; ++i)
        pre1[i] = pre1[i - 1] + a[i].second;
    for (int i = 0; i < n - 1; ++i)
        pre2[i] = pre1[i] - a[i + 1].first;

    long long res = -1e18, mn = pre2[0];
    for (int i = 1; i <= n; ++i){
        res = max(res, pre1[i] - a[i].first - mn);
        mn = min(mn, pre2[i]);
    }

    cout << res;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50