1. 两数之和
第一种解法：暴力枚举
class Solution {
public int[] twoSum(int[] nums, int target) {
//遍历数组
for(int i=0;i第一种解法：暴力枚举
class Solution {
public int[] twoSum(int[] nums, int target) {
//遍历数组
for(int i=0;i