"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.

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}).

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