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Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

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A. Next Round

time limit per test

3 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard output"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 *a* _{1}, *a* _{2}, ..., *a* _{ n} (0 ≤ *a* _{ i} ≤ 100), where *a* _{ i} 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: *a* _{ i} ≥ *a* _{ i + 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.

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