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 3 possible results:
-1: The number I picked is lower than your guess (i.e.
pick < num).
1: The number I picked is higher than your guess (i.e.
pick > num).
0: The number I picked is equal to your guess (i.e.
pick == num).
Return the number that I picked.
n = 10, pick = 6
n = 1, pick = 1
n = 2, pick = 1
1 <= n <= 2^31 - 1
1 <= pick <= n
GitHub 代码同步地址： 374.GuessNumberHigherOrLower.cpp