Submission #502443

#	Time	Username	Problem	Language	Result	Execution time	Memory
502443		zorianka	Art Exhibition (JOI18_art)	C++17	100 / 100	475 ms	8692 KiB

art

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC optimize("fast-math")
//#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>

using namespace std;
using ll = long long;
#define int ll

void solve() {
    int n;
    cin >> n;
    vector<pair<ll, ll>> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i].first >> a[i].second;
    }
    sort(a.begin(), a.end());
    ll ans = -1e15;
    ll pref = 0;
    ll minn = -a[0].first;
    for (int i = 0; i < n; i++) {
        pref += a[i].second;
        ll val = pref - a[i].first;
        ans = max(ans, val - minn);
        minn = min(minn, pref - a[i + 1].first);
    }
    cout << ans;
}

signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif
    int t = 1;
//    cin >> t;
    while (t--)
        solve();
    return 0;
}

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