Submission #151891

#	Time	Username	Problem	Language	Result	Execution time	Memory
151891		Bodo171	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	200 ms	8684 KiB

bulves

#include <iostream>
#include <queue>
using namespace std;

const int nmax=500005;
priority_queue<long long> pq;
long long c[nmax];
long long ans;
int n,i,j,a,b;
int main()
{
    ios_base::sync_with_stdio(false);
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>a>>b;
        long long dif=a-b;
        c[i]=(c[i-1]+dif);
    }
    for(i=1;i<=n;i++)
    {
        if(c[i]<0) ans-=c[i],c[i]=0;
        if(c[i]>c[n]) ans+=(c[i]-c[n]),c[i]=c[n];
    }
    for(i=1;i<=n;i++)
    {
        pq.push(c[i]);
        if(pq.top()>c[i])
        {
            pq.push(c[i]);
            ans+=1LL*pq.top()-c[i];
            pq.pop();
        }
    }
    cout<<ans;
    return 0;
}

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36