"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.

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.