Submission #13,245

2025-01-07 10:44:53

cpp17

Accepted 50/50

18ms

508 KiB

#include <iostream>
#include <vector>
using namespace std;

int main()
{
    int N, K;
    cin >> N >> K;

    int c=0;

    for(int i=0, t; i<N; i++){
        cin >> t;
        if(t) c++;
    }

    long long o=0;
    for(int i=0; i<c-K+1; i++){
        for(int j=i+K-1; j<c; j++) o++;
    }


    cout << o << endl;
    return 0;
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	508 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	0/0	17ms	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	3/3	1ms	316 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	2ms	508 KiB
		12	Accepted	2/2	2ms	316 KiB
		13	Accepted	3/3	1ms	316 KiB
		14	Accepted	2/2	17ms	400 KiB
		15	Accepted	2/2	17ms	396 KiB
		16	Accepted	3/3	17ms	404 KiB
		17	Accepted	3/3	17ms	316 KiB
		18	Accepted	3/3	18ms	400 KiB
		19	Accepted	3/3	17ms	400 KiB
		20	Accepted	3/3	17ms	400 KiB
		21	Accepted	3/3	17ms	396 KiB
		22	Accepted	3/3	17ms	396 KiB