Submission #14,057

2025-01-09 18:01:49

cpp17

Accepted 50/50

90ms

4324 KiB

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, m; cin >> n >> m;
    vector<int>cnt(n+1);
    for(int i = 0; i < m; i++)
    {
        int a, b; cin >> a >> b;
        cnt[a]++, cnt[b]--;
    }
    cnt[n] = 1;
    int ans = 0;
    bool b = false;
    for(int i = 1; i <= n; i++)
    {
        cnt[i] += cnt[i-1];
        if(cnt[i] == 0)
        {
            b = true;
        }
        else if(b)
        {
            ans++;
            b = false;
        }
    }
    if(b)ans++;
    cout << ans;
    return 0;
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	90ms	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	508 KiB
		8	Accepted	2/2	1ms	508 KiB
		9	Accepted	2/2	1ms	316 KiB
		10	Accepted	2/2	1ms	316 KiB
		11	Accepted	2/2	1ms	600 KiB
		12	Accepted	2/2	2ms	804 KiB
		13	Accepted	3/3	4ms	568 KiB
		14	Accepted	3/3	7ms	1128 KiB
		15	Accepted	3/3	4ms	1132 KiB
		16	Accepted	3/3	64ms	4316 KiB
		17	Accepted	3/3	64ms	4316 KiB
		18	Accepted	3/3	72ms	4320 KiB
		19	Accepted	3/3	8ms	1988 KiB
		20	Accepted	3/3	9ms	2356 KiB
		21	Accepted	3/3	81ms	4324 KiB
		22	Accepted	3/3	79ms	4320 KiB