human
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.

Examples

Input

8 5
10 9 8 7 7 7 5 5

Output

6

Input

4 2
0 0 0 0

Output

0

Note

In the first example the participant on the 5th place earned 7 points. As the participant on the 6th place also earned 7 points, there are 6 advancers.

In the second example nobody got a positive score.
Solve the task in PYTHON3.
assistant
#Here is code to 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.

class Solution(object):
    def __init__(self):
        self.answer = 0
        self.n = self.k = None
        self.data = None
        self.get_data()
        self.solve()
        self.print_answer()

    pass

    def get_data(self):
        self.n, self.k = map(int, input().split())
        self.data = [0] + list(map(int, input().split()))
        pass

    def print_answer(self):
        print(self.answer)
        pass

    def solve(self):
        for i in range(1, self.k + 1):
            if self.data[i]:
                self.answer += 1
            else:
                break
        for i in range(self.k + 1, len(self.data)):
            if self.data[i]:
                if self.data[i] == self.data[self.k]:
                    self.answer += 1
                else:
                    break
            else:
                break
        pass

def main():
    Solution()
    pass

if __name__ == '__main__':
    main()