Number of Players (for MTS2)

Count the players who can level up under competition ranking: players with the same score share the same rank, and the rank of the next distinct score equals its position in the sorted order; players with a score of 0 never level up.

The standard input/output format and any supplementary ranges on this site are as defined in this problem statement.

输入格式

The first line contains n k (1≤n≤100000, 1≤k≤n), and the next line contains n scores (0≤score≤100).

输出格式

Output the number of players whose rank does not exceed k and whose score is greater than 0.

样例 1

输入：

4 3
100 50 50 25

输出：

3

样例 2

输入：

5 4
20 40 60 80 100

输出：

4

样例 3

输入：

5 4
2 2 3 4 5

输出：

5