proc getchar_unlocked():char {. importc:"getchar_unlocked",header: "<stdio.h>" ,discardable.}
proc scan(): int =
  while true:
    let k = getchar_unlocked()
    if k < '0': return
    result = 10 * result + k.ord - '0'.ord
let x = scan()
let y = scan()
let z = scan()
echo z - (z - x >= 0).int - (z - y >= 0).int