704.二分查找

LeetCode 算法题解与代码实现

class Solution {
    public int search(int[] nums, int target) {
        int left = -1, right = nums.length;
        while (left + 1 != right) {
            int mid = left + (right - left) / 2;
            if (nums[mid] < target) {
                left = mid;
            } else {
                right = mid;
            }
        }
        if (right == nums.length || nums[right] != target) {
            return -1;
        }
        return right;
    }
}