Submission #238505

#	Time	Username	Problem	Language	Result	Execution time	Memory
238505		Autoratch	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	272 ms	18444 KiB

bulves

#include <bits/stdc++.h>
using namespace std;

const int N = 5e5 + 1;

int n;
long long a[N],ans,s;
priority_queue<long long> q;
vector<long long> v;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);

    cin >> n;
    for(int i = 1;i <= n;i++)
    {
        int x,y;
        cin >> x >> y;
        a[i] = x-y+a[i-1];
    }
    for(int i = 1;i <= n;i++)
    {
        if(a[i]<0) ans+=-a[i],a[i] = 0;
        if(a[i]>a[n]) ans+=a[i]-a[n],a[i] = a[n];
        q.push(a[i]),q.push(a[i]),q.pop();
        s+=a[i];
    }
    while(!q.empty()) v.push_back(q.top()),q.pop();
    reverse(v.begin(),v.end());
    long long prev = 0;
    for(auto x : v) s-=(n--)*(x-prev),prev = x;
    cout << s+ans;
}

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