Submission #372445

#	Time	Username	Problem	Language	Result	Execution time	Memory
372445		amano_hina	Art Exhibition (JOI18_art)	C++14	100 / 100	568 ms	30956 KiB

art

#include<bits/stdc++.h>
using namespace std;
long long n,a[500005],b[500005],c[500005],d[500005],ans;
pair<long long,long long> p[500005];
int main()
{
    cin>>n;
    for(int i=0;i<n;i++)
    {
        cin>>a[i]>>b[i];
        p[i].first=a[i];
        p[i].second=b[i];
    }
    sort(p,p+n);
    for(int i=0;i<n;i++)
    {
        a[i]=p[i].first;
        b[i]=p[i].second;
        //cout<<a[i]<<" "<<b[i]<<'\n';
    }
    c[0]=b[0];
    d[0]=b[0];
    for(int i=1;i<n;i++)
    {
        c[i]=c[i-1]+b[i];
        d[i]=d[i-1]+b[i];
    }
    for(int i=0;i<n;i++)
    {
        d[i]=d[i]-a[i];
        c[i]=c[i]-b[i]-a[i];
    }
    ans=b[0];
    for(int i=n-2;i>=0;i--)
    {
        d[i]=max(d[i],d[i+1]);
    }
    for(int i=1;i<n;i++)
    {
        c[i]=min(c[i],c[i-1]);
    }
    for(int i=0;i<n;i++)
    {
        ans=max(ans,d[i]-c[i]);
    }
    cout<<ans;

}

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