import strutils, sequtils

var n, k: int
(n, k) = map(split readLine stdin, parseInt)
var S = readLine stdin
var T = newSeq[int](n)
var i, j = 0
var flg = false
var m: int
var mark: char

while not flg:
  while S[i] != ')' or T[i] != 0:
    i += 1
  j += 1
  T[i] = j
  flg = if i == n - 1: true else: false
  while T[i] > 0:
    i -= 1
  T[i] = j

for i in 0 ..< n:
  if i + 1 == k:
    m = T[i]
    mark = S[i]

for i in 0 ..< n:
  if T[i] == m and S[i] != mark:
    echo i + 1