Submission #765155

#	Time	Username	Problem	Language	Result	Execution time	Memory
765155		IsaL	Art Exhibition (JOI18_art)	C++17	100 / 100	146 ms	8640 KiB

art

#include<bits/stdc++.h>
 
using namespace std;
 
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long, long long>

int tc;
long long n;
pll arr[500069];

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    long long i;
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>arr[i].fi>>arr[i].se;
    }
    sort(arr+1,arr+n+1);
    // 1 <= j <= i <= n
    // cost(j,i) = a[i] - a[j] + pref[i] - pref[j-1]
    //           = a[i] + pref[i] - (a[j] + pref[j-1])
    long long ans = 0, mn = 1e18, sm = 0;
    for(i=1;i<=n;i++)
    {
        mn = min(mn, sm-arr[i].fi);
        sm += arr[i].se;
        ans = max(ans, sm-arr[i].fi-mn);
    }
    cout<<ans<<'\n';
}

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