Guess Number Higher or Lower
Created: September 19, 2019 by [lek-tin]
Last updated: September 19, 2019
We are playing the Guess Game. The game is as follows:
I pick a number from 1 to n. You have to guess which number I picked.
Every time you guess wrong, I’ll tell you whether the number is higher or lower.
You call a pre-defined API guess(int num) which returns 3 possible results (-1, 1, or 0):
-1 : My number is lower
1 : My number is higher
0 : Congrats! You got it!
Example :
Input: n = 10, pick = 6
Output: 6
Solution
# 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):
class Solution(object):
def guessNumber(self, n):
"""
:type n: int
:rtype: int
"""
if n <= 1:
return 1
l, h = 1, n
while l <= h:
mid = l + (h-l)//2
print(mid)
if guess(mid) == 1:
l = mid + 1
elif guess(mid) == -1:
h = mid - 1
else:
return mid