Submission #958873

#	Time	Username	Problem	Language	Result	Execution time	Memory
958873		vjudge1	Art Exhibition (JOI18_art)	C++17	100 / 100	143 ms	16212 KiB

art

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector <ll>;

int main () {
    cin.tie(nullptr) -> sync_with_stdio(false);
    ll n;
    cin >> n;
    vector <pair <ll, ll> > ve(n);
    for (auto &[a, b] : ve) cin >> a >> b;
    sort(ve.begin(), ve.end());
    vll ps(n+1, 0);
    for (ll i = 0; i < n; i++) {
        ps[i+1] = ps[i] + ve[i].second;
    }
    vll maxN(n);
    maxN[n-1] = ps[n] - ve[n-1].first;
    for (ll i = n-2; i >= 0; i--) {
        maxN[i] = max(maxN[i+1], ps[i+1] - ve[i].first);
    }
    ll ans = 0;
    for (ll i = 0; i < n; i++) {
        auto [a, b] = ve[i];
        ll maxSum = maxN[i]-ps[i]+a;
        ans = max(ans, maxSum);
    }
    cout << ans << '\n';
    return 0;
}

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