Submission #715951

#	Time	Username	Problem	Language	Result	Execution time	Memory
715951		amunduzbaev	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	143 ms	19116 KiB

bulves

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

#define ar array
typedef long long ll;
#define int ll

const int N = 5e5 + 5;
int a[N], b[N];

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n; cin >> n;
	int res = 0;
	for(int i=1;i<=n;i++){
		cin >> a[i] >> b[i];
		a[i] -= b[i];
		a[i] += a[i-1];
	}
	
	int mx = a[n];
	assert(0 <= mx);
	for(int i=1;i<=n;i++){
		if(a[i] < 0){
			res -= a[i];
			a[i] = 0;
		}
		if(a[i] > mx){
			res += (a[i] - mx);
			a[i] = mx;
		}
	}
	
	priority_queue<int> q;
	for(int i=1;i<=n;i++){
		q.push(a[i]);
		if(a[i] < q.top()){
			res += (q.top() - a[i]);
			q.pop(); q.push(a[i]);
		}
	}
	
	cout<<res<<"\n";
}

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