Submission #1293525

#	Time	Username	Problem	Language	Result	Execution time	Memory
1293525		fairkrash	Art Exhibition (JOI18_art)	C++20	100 / 100	128 ms	12112 KiB

art

#include <bits/stdc++.h>

#include <random>

using namespace std;
using ll = long long;
using ld = long double;

ll INF = 1e18 + 10;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    ll n;
    cin >> n;
    vector<pair<ll, ll>> s(n);
    ll ans = -INF;
    for (ll i = 0; i < n; i++) {
        cin >> s[i].first >> s[i].second;
        ans = max(ans, s[i].second);
    }
    std::sort(s.begin(), s.end());
    vector<ll> pref(n + 1);
    for (ll i = 0; i < n; i++) {
        pref[i + 1] = pref[i] + s[i].second;
    }
    ll mx = pref[n] - s[n - 1].first;
    for (ll j = n - 2; j >= 0; j--) {
        ans = max(ans, mx - pref[j] + s[j].first);
        mx = max(mx, pref[j + 1] - s[j].first);
    }
    cout << ans;
}

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