We are playing the Guess Game. The game is as follows:
I pick a number from
n. You have to guess which number I picked.
Every time you guess wrong, I will tell you whether the number I picked is higher or lower than your guess.
You call a pre-defined API
int guess(int num), which returns three possible results:
-1: Your guess is higher than the number I picked (i.e.
num > pick).
1: Your guess is lower than the number I picked (i.e.
num < pick).
0: your guess is equal to the number I picked (i.e.
num == pick).
Return the number that I picked.
Input: n = 10, pick = 6
Input: n = 1, pick = 1
Input: n = 2, pick = 1
1 <= n <= 231 - 1
1 <= pick <= n
# The guess API is already defined for you. # @param num, your guess # @return -1 if my number is lower, 1 if my number is higher, otherwise return 0 # def guess(num: int) -> int: class Solution: def guessNumber(self, n: int) -> int: beg = 1 end = n if guess(beg) == 0: return beg if guess(end) == 0: return end while beg <= end: mid = (beg + end) // 2 curr = guess(mid) if curr == 0: return mid elif curr == -1: end = mid else: beg = mid