Submission #202060

#	Time	Username	Problem	Language	Result	Execution time	Memory
202060		SrpskiRatnik	Art Exhibition (JOI18_art)	C++14	100 / 100	254 ms	28796 KiB

art

// https://oj.uz/problem/view/JOI18_art

#include <bits/stdc++.h>

using namespace std;

#define ll long long

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

    int n;
    cin >> n;

    pair<ll,ll> pr[n];
    for(int i = 0; i < n; i++)
    {
        cin >> pr[i].first >> pr[i].second;
    }

    sort(pr,pr+n);

    ll pref[n+1];
    pref[0] = 0;
    for(int i = 0; i <= n; i++)
    {
        pref[i+1] = pref[i] + pr[i].second;
    }

    ll lmax[n];
    lmax[0] = pr[0].first;

    for(int i = 1; i < n; i++)
    {
        lmax[i] = max(lmax[i-1], pr[i].first - pref[i]);
    }

    ll best = LLONG_MIN;
    for(int i = 0; i < n; i++)
    {
        best = max(best, lmax[i] + pref[i+1] - pr[i].first);
    }

    cout << best;
}

/*
3
2 3
11 2
4 5
*/

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