题解 | 二分查找-I
二分查找-I
https://www.nowcoder.com/practice/d3df40bd23594118b57554129cadf47b
import java.util.*;
public 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 (int[] nums, int target) {
if (nums == null || nums.length == 0) {
return -1;
}
return search(nums, target, 0, nums.length - 1);
}
public static int search(int[] nums, int target, int start, int end) {
if (start > end) {
return -1;
}
int mid = start + (end - start) / 2;
if (nums[mid] == target) {
return mid;
} else if (nums[mid] < target) {
return search(nums, target, mid + 1, end);
} else {
return search(nums, target, start, mid - 1);
}
}
}