leetcode Guess Number Higher or Lower
leetcode Guess Number Higher or Lower 題目:https://leetcode.com/problems/guess-number-higher-or-lower/
猜數字
解題思路:二分查詢演算法
/** * return -1 if my number is lower, 1 if my number is higher, otherwise return 0 * @param n * @return */ public int guessNumber(int n) { int left=1,right=n; while(left<=right){ int mid=(right-left)/2+left; int guess = guess(mid); if(guess==0){ return mid; }else if(guess==-1){ right=mid-1; }else if (guess==1){ left=mid+1; } } return -1; }
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