제출 #948796

#제출 시각아이디문제언어결과실행 시간메모리
948796IrateArt Exhibition (JOI18_art)C++14
100 / 100
148 ms12196 KiB
#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<pair<long long, int>>v(n + 1);
    vector<long long>pref(n + 1);
    for(int i = 1;i <= n;++i){
        cin >> v[i].first >> v[i].second;
    }
    sort(v.begin(), v.end());
    for(int i = 1;i <= n;++i){
        pref[i] = pref[i - 1] + v[i].second;
    }
    long long res = 0, mx = -1e18;
    for(int i = 1;i <= n;++i){
        mx = max(mx, v[i].first - pref[i - 1]);
        res = max(res, mx + pref[i] - v[i].first);
    }
    cout << res << '\n';
}
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