Submission #679073

#	Time	Username	Problem	Language	Result	Execution time	Memory
679073		kusssso	Art Exhibition (JOI18_art)	C++14	100 / 100	193 ms	28708 KiB

art

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 5e5 + 5;
const ll inf = 1e18;
#define fi first
#define se second

int n;
pair<ll, ll> p[N];
ll f[N], s[N];
ll ans = -inf;

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> p[i].fi >> p[i].se;
    sort(p + 1, p + 1 + n);
    for (int i = 1; i <= n; i++) f[i] = f[i - 1] + p[i].se;
    s[n + 1] = -inf;
    for (int i = n; i >= 1; i--) s[i] = max(s[i + 1], f[i] - p[i].fi);
    for (int i = 1; i <= n; i++) {
        ans = max(ans, p[i].fi + s[i] - f[i - 1]);
    }
    cout << ans;
    
    return 0;
}

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