Submission #13,219

2025-01-07 09:11:47

cpp17

Accepted 50/50

18ms

808 KiB

#include<vector>
#include <iostream>
using namespace std;
int main()
{
    int n, k;
    cin >> n >> k;
    vector<int> v(n);
    long long  s = 0;
    for (int i = 0; i < n; i++) {
        cin >> v[i];
        if (v[i] == 1) s++;
    }
    long long vsz = 0;

    while (s >= k) {
        vsz += s - k + 1;
        s--;
    }
    cout << vsz << endl;
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	500 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	0/0	18ms	568 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	2/2	1ms	316 KiB
		6	Accepted	2/2	1ms	316 KiB
		7	Accepted	3/3	1ms	508 KiB
		8	Accepted	3/3	1ms	316 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	2/2	1ms	316 KiB
		11	Accepted	3/3	1ms	316 KiB
		12	Accepted	2/2	1ms	316 KiB
		13	Accepted	3/3	1ms	316 KiB
		14	Accepted	2/2	17ms	772 KiB
		15	Accepted	2/2	17ms	784 KiB
		16	Accepted	3/3	18ms	796 KiB
		17	Accepted	3/3	17ms	564 KiB
		18	Accepted	3/3	18ms	800 KiB
		19	Accepted	3/3	17ms	808 KiB
		20	Accepted	3/3	17ms	808 KiB
		21	Accepted	3/3	18ms	804 KiB
		22	Accepted	3/3	18ms	564 KiB