Submission #395112

#	Time	Username	Problem	Language	Result	Execution time	Memory
395112		Daniel123	Lightning Rod (NOI18_lightningrod)	C++14	80 / 100	2088 ms	236472 KiB

Main

#include <iostream>
#include <vector>

using namespace std;

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

	int n;
	cin >> n;
	int* x = new int[n];
	int* y = new int[n];
	vector<int> s;
	for (int i = 0; i < n; i++)
	{
		cin >> x[i] >> y[i];
		while (!s.empty() && x[i] - x[s.back()] <= y[i] - y[s.back()])
		{
			s.pop_back();
		}
		if (s.empty() || x[i] - x[s.back()] > y[s.back()] - y[i])
		{
			s.push_back(i);
		}
	}
	cout << s.size() << endl;
	cin >> n;
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 10 / 10
• Subtask 7: 0 / 20