Submission #1302716

#	Time	Username	Problem	Language	Result	Execution time	Memory
1302716		nathlol2	Art Exhibition (JOI18_art)	C++20	100 / 100	127 ms	15952 KiB

art

#include <bits/stdc++.h>
#define int long long
#define fi first
#define sc second
using namespace std;
const int N = 555555;
int n, ans, pf[N], pfm[N];
pair<int, int> a[N];
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    for(int i = 1;i<=n;i++){
        cin >> a[i].fi >> a[i].sc;
    }
    sort(a + 1, a + n + 1);
    for(int i = 1;i<=n;i++){
        pf[i] = pf[i - 1] + a[i].sc;
    }
    pfm[n] = pf[n] - a[n].fi;
    for(int i = n - 1;i>=1;i--){
        pfm[i] = max(pfm[i + 1], pf[i] - a[i].fi);
    }
    for(int i = 1;i<=n;i++){
        ans = max(ans, pfm[i] - pf[i - 1] + a[i].fi);
    }
    cout << ans;
}

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