题解 | #二分查找-I#

using System;
using System.Collections.Generic;


class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param nums int整型一维数组 
     * @param target int整型 
     * @return int整型
     */
    public int search (List<int> nums, int target) {
        if(nums == null) return -1;
        int right = 0;
        int left = nums.Count - 1;
        while(right <= left){
            int cur = right + (left - right)/2;
            if(nums[cur] < target) right = cur + 1;
            else if(nums[cur] == target) return cur;
            else left = cur - 1;
        }
        //if(nums[left] == target) return left;
        return -1;
    }
}