Submission #21,459

2026-01-13 09:23:26

cpp17

Accepted 50/50

19ms

1148 KiB

#include <iostream>

using namespace std;

int main()
{
    long long n,k;
    cin>>n>>k;
    long long t[n];
    long long v=0;
    for(long long i=0; i<n; i++)
    {cin>>t[i];
    if(t[i]==1)v++;
    }
    if(v<k){cout<<0; return 0;}
    else{
        cout << (v-k+2)*(v-k+1)/2;
    }
    return 0;
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	512 KiB
		3	Accepted	0/0	18ms	1116 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	2/2	1ms	316 KiB
		6	Accepted	2/2	1ms	508 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	332 KiB
		12	Accepted	2/2	1ms	408 KiB
		13	Accepted	3/3	1ms	316 KiB
		14	Accepted	2/2	17ms	1076 KiB
		15	Accepted	2/2	17ms	1112 KiB
		16	Accepted	3/3	18ms	1080 KiB
		17	Accepted	3/3	17ms	1116 KiB
		18	Accepted	3/3	19ms	1148 KiB
		19	Accepted	3/3	18ms	1076 KiB
		20	Accepted	3/3	18ms	1076 KiB
		21	Accepted	3/3	19ms	1076 KiB
		22	Accepted	3/3	19ms	1076 KiB