솜씨좋은장씨

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 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 ..