next round

"Contestant who earns a score equal to or greater than the k-th place finisher's score will advance to the next round, as long as the contestant earns a positive score..." — an excerpt from contest rules.

A total of n participants took part in the contest (n ≥ k), and you already know their scores. Calculate how many participants will advance to the next round.

Input

The first line of the input contains two integers n and k (1 ≤ k ≤ n ≤ 50) separated by a single space.

The second line contains n space-separated integers a1, a2, ..., an (0 ≤ ai ≤ 100), where ai is the score earned by the participant who got the i-th place. The given sequence is non-increasing (that is, for all i from 1 to n - 1 the following condition is fulfilled: ai ≥ ai + 1).

Output

Output the number of participants who advance to the next round.

幼儿园级别的题目

#include<stdio.h>int main(){    int n, k, i = 0, sum = 0;    int p[50];    scanf ("%d%d", &n, &k);        while (n-- > 0)    {        scanf ("%d", &p[i]);        i++;    }    int t=0;    for (; t<i; t++)    {        if (p[t] > 0 && p[t] >= p[k-1])        {            sum++;        }    }        printf ("%d\n", sum);    return 0;}