Submission #940897

#	Time	Username	Problem	Language	Result	Execution time	Memory
940897		12345678	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	121 ms	25024 KiB

bulves

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=5e5+5;
ll n, a[nx], b[nx], d[nx], res;
priority_queue<ll> pq;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n;
    for (int i=1; i<=n; i++) cin>>a[i]>>b[i], d[i]=d[i-1]+a[i]-b[i];
    for (int i=1; i<n; i++)
    {
        //cout<<"val "<<i<<' '<<d[i]<<' '<<d[n]<<'\n';
        if (pq.empty())
        {
            if (d[i]<=0) res-=d[i];
            else if (d[i]>=d[n]) res+=d[i]-d[n], pq.push(d[n]);
            else pq.push(d[i]);
            //cout<<i<<' '<<res<<'\n';
        }
        else
        {
            if (d[i]>=d[n]) res+=(d[i]-d[n]), pq.push(d[n]);
            else if (d[i]>=pq.top()) pq.push(d[i]);
            else if (d[i]<=0) res+=pq.top()-d[i], pq.pop();
            else res+=pq.top()-d[i], pq.push(max(0ll, d[i])), pq.push(max(0ll, d[i])), pq.pop();
        }
        //priority_queue<ll> tmp=pq;
        //cout<<"pq "<<res<<':';
        //while (!tmp.empty()) cout<<tmp.top()<<' ', tmp.pop();
        //cout<<'\n';
        //cout<<i<<' '<<res<<'\n';
    }
    cout<<res;
}

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