#include<stdio.h> int main() { int a,b,s[53],i; scanf("%d%d",&a,&b); int count=0; for (i=0;i<a;i++){ scanf("%d",&s[i]); if (i<b && s[i] >0){ count++; } if (i>b-1 && s[i]== s[b-1] && s[i] > 0){ count++; } } printf("%d\n",count); return 0; }
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