#include <iostream>
using namespace std;
#define maxSize 60
int main()
{
int score[maxSize];
int n, k, res;
cin>>n>>k;
res=0;
for(int i=0; i<n; ++i)
cin>>score[i];
for(int i=0; i<n; ++i)
if((score[i]>=score[k-1]) && (score[i]>0))
++res;
cout<<res<<endl;
return 0;
}
原文：https://www.cnblogs.com/commario/p/11803466.html