Submission #16,834

2025-05-13 18:42:13

cpp17

Accepted 50/50

85ms

4320 KiB

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

int main() {
	int n, m;
	cin >> n >> m;
	vector<int> diff(n + 1);
	for (int i = 0; i < m; i ++) {
		int x, y;
		cin >> x >> y;
		diff[x] ++;
		diff[y] --;
	}
	int sum = 0, ans = 0;
	for (int i = 1; i < n; i ++) {
		sum += diff[i];
		if (sum == 0 && (diff[i] != 0 || i == 1)) ans ++;
	}
	cout << ans;
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	85ms	4148 KiB
		3	Accepted	2/2	1ms	316 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	2/2	1ms	316 KiB
		6	Accepted	2/2	1ms	316 KiB
		7	Accepted	2/2	1ms	316 KiB
		8	Accepted	2/2	1ms	316 KiB
		9	Accepted	2/2	1ms	316 KiB
		10	Accepted	2/2	1ms	316 KiB
		11	Accepted	2/2	1ms	756 KiB
		12	Accepted	2/2	2ms	772 KiB
		13	Accepted	3/3	4ms	564 KiB
		14	Accepted	3/3	8ms	1016 KiB
		15	Accepted	3/3	4ms	1080 KiB
		16	Accepted	3/3	63ms	4192 KiB
		17	Accepted	3/3	64ms	4320 KiB
		18	Accepted	3/3	71ms	4320 KiB
		19	Accepted	3/3	8ms	1844 KiB
		20	Accepted	3/3	9ms	2356 KiB
		21	Accepted	3/3	76ms	4148 KiB
		22	Accepted	3/3	75ms	4320 KiB