Submission #524579

#	Time	Username	Problem	Language	Result	Execution time	Memory
524579		blue	Potatoes and fertilizers (LMIO19_bulves)	C++17	100 / 100	316 ms	34468 KiB

bulves

#include <iostream>
#include <vector>
#include <set>
using namespace std;

using ll = long long;
using vll = vector<ll>;
#define sz(x) int(x.size())

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

	int N;
	cin >> N;

	vll x(1+N);

	ll basicCost = 0;

	x[0] = 0;
	for(int i = 1; i <= N; i++)
	{
		ll a, b;
		cin >> a >> b;
		x[i] = x[i-1] + a - b;
	}

	for(int i = 1; i < N; i++)
	{
		if(x[i] < 0)
		{
			basicCost += 0 - x[i];
			x[i] = 0;
		}

		if(x[i] > x[N])
		{
			basicCost += x[i] - x[N];
			x[i] = x[N];
		}
	}

	ll ans0 = 0;

	multiset<ll> points;

	for(int i = 1; i <= N; i++)
	{
		ans0 += x[i];

		points.insert(x[i]);
		points.insert(x[i]);
		points.erase(points.find(*points.rbegin()));
	}

	ll curr_sl = -N;

	ll answer = basicCost + ans0;

	points.insert(0);

	while(sz(points) > 1)
	{
		ll u = *points.begin();
		points.erase(points.begin());

		ll v = *points.begin();

		answer += (v - u) * curr_sl;

		curr_sl++;
	}

	cout << answer << '\n';
}

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