Submission #1231340

#	Time	Username	Problem	Language	Result	Execution time	Memory
1231340		k1r1t0	Advertisement 2 (JOI23_ho_t2)	C++20	100 / 100	138 ms	24308 KiB

Main

#include <bits/stdc++.h>

using namespace std;
#define int long long

const int N = 510000;

int n, x[N], y[N];
vector<array<int, 2>> vec;

int32_t main() {
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++)
		cin >> x[i] >> y[i];
	for (int i = 1; i <= n; i++)
		vec.push_back({y[i] - x[i], y[i] + x[i]});
	sort(begin(vec), end(vec));
	stack<array<int, 2>> st;
	for (auto [x, y] : vec) {
		while (!st.empty() && st.top()[0] <= x && st.top()[1] <= y)
			st.pop();
		st.push({x, y});
	}
	cout << st.size();
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31