Submission #950979

#	Time	Username	Problem	Language	Result	Execution time	Memory
950979		daoquanglinh2007	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	148 ms	28804 KiB

bulves

#include <bits/stdc++.h>
using namespace std;
 
#define int long long
 
const int NM = 5e5;
 
int n, a[NM+5], b[NM+5], c[NM+5], d[NM+5], cur = 0;
priority_queue <int> pq;
 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> a[i] >> b[i];
        c[i] = c[i-1]+a[i];
        d[i] = d[i-1]+b[i];
    }
    pq.push(0);
    for (int i = 1; i < n; i++){
        if (c[i]-d[i] >= pq.top()){
            pq.push(c[i]-d[i]);
            continue;
        }
        cur += pq.top()-(c[i]-d[i]);
        pq.pop();
        if (c[i]-d[i] > 0){
            pq.push(c[i]-d[i]);
            pq.push(c[i]-d[i]);
        }
        else{
            pq.push(0);
            pq.push(0);
        }
    }
    int lst = pq.top(), slope = 0;
    while (lst > c[n]-d[n]){
        cur += slope*(lst-max(c[n]-d[n], pq.top()));
        lst = pq.top();
        pq.pop();
        slope++;
    }
    cout << cur;
    return 0;
}

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