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.
 What is a 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?
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.

# n, m , a = (map(int, input().split()))
# c1 = n // a
# c2 = m // a

# if n % a != 0:
#     c1 = (n // a) + 1
# else:
#     c1 = n // a

# if m % a != 0:
#     c2 = (m // a) + 1
# else:
#     c2 = m // a

# print(c1 * c2)

# def code_print(s):
#     print(s[0] + str(len(s) - 2) + s[-1])

# n = int(input())
# strings = []
# for i in range(n):

#     strings.append(input())

# # print(strings)

# for i in strings:
#     if len(i) > 10:
#         code_print(i)
#     else:
#         print(i)

n, k = (map(int, input().split()))

scores = list(map(int, input().split()))
score = scores[k - 1]
ans = []
for i in scores:
    if i != 0 and i >= score:
        ans.append(i)

print(len(ans))