Submission #842249

#	Time	Username	Problem	Language	Result	Execution time	Memory
842249		erering	Art Exhibition (JOI18_art)	C++17	100 / 100	152 ms	28876 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define pb push_back
#define ll long long
#define int ll
const long long inf=1e18;
const int MOD=1e9+7;
const int N=5e5+5;
int best[N],prefval[N];
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n; cin>>n;
    pair<int,int> p[n+1];
    for(int i=1;i<=n;i++)cin>>p[i].first>>p[i].second;
    sort(p,p+(n+1));
    for(int i=1;i<=n;i++)prefval[i]=p[i].second+prefval[i-1];
    int idx=1;
    for(int i=1;i<=n;i++){
      if(p[i].first>prefval[i-1]-prefval[idx-1]+p[idx].first)idx=i;
      best[i]=idx;
    }
    int mx=0;
    for(int i=1;i<=n;i++){
      int ans=prefval[i]-prefval[best[i]-1]+p[best[i]].first;
      ans-=p[i].first;
      mx=max(mx,ans);
    }
    cout<<mx;
}

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