Submission #723132

#	Time	Username	Problem	Language	Result	Execution time	Memory
723132		adrilen	Art Exhibition (JOI18_art)	C++17	100 / 100	206 ms	20688 KiB

art

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
typedef pair<ll, ll> pii;


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    int n;
    cin >> n;

    vector <pii> v(n);
    for (pii &p : v) cin >> p.first >> p.second;
    
    sort(v.begin(), v.end());

    // Make prefix sum
    for (int i = 1; i < n; i++) v[i].second += v[i - 1].second;
    ll output = 0;
    int i, j = 0;
    for (i = 0; i < n; i++)
    {
        // When i changes, you could increase j to i
        if (v[i].second - (i != 0 ? v[i - 1].second : 0) > v[i].second - (j != 0 ? v[j - 1].second : 0) - v[i].first + v[j].first) j = i;
        output = max(output, v[i].second - (j != 0 ? v[j - 1].second : 0) - v[i].first + v[j].first);
    }
    cout << output << "\n";
}   


/*
Will be continous segments.

....a....b....
then if c > b -> d >=a
....ddd...c

*/

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