Submission #573110

#	Time	Username	Problem	Language	Result	Execution time	Memory
573110		colossal_pepe	Art Exhibition (JOI18_art)	C++17	100 / 100	433 ms	54236 KiB

art

#include <iostream>
#include <algorithm>
#include <numeric>
#include <map>
using namespace std;

using ll = long long;

const int MAXN = 5e5 + 5;

int n;
ll a[MAXN], b[MAXN];

ll solve() {
    int p[n];
    iota(p, p + n, 0);
    sort(p, p + n, [](int i, int j) {
        return a[i] < a[j];
    });
    ll pfx_sum = 0, loss = 0;
    map<ll, ll> m;
    ll ans = 0;
    for (int i = 0; i < n; i++) {
        if (i == 0 or a[p[i]] != a[p[i - 1]]) {
            m[a[p[i]]] = a[p[i]] - pfx_sum;
            loss = max(loss, m[a[p[i]]]);
        }
        pfx_sum += b[p[i]];
        ans = max(ans, pfx_sum + loss - a[p[i]]);
    }
    return ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
    }
    cout << solve() << '\n';
    return 0;
}

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