题解 | #二分查找-I#

class Solution {
public:
    /**
     * 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vector 
     * @param target int整型 
     * @return int整型
     */
    int search(vector<int>& nums, int target) {
        // write code here
        int l = 0;
        int r = nums.size()-1;
        while (l<=r) {
            int mid = (l+r)/2;
            if(nums[mid]==target){
                return mid;
            }else if(nums[mid]>target){
                r = mid - 1;
            }else{
                l = mid +1;
            }
        }

        return -1;
    }
};