1.two sum.java

class Solution { public int[] twoSum(int[] nums, int target) { int[] ans = new int[2]; for(int i = 0; i < nums.length; i++) { for(int j = i + 1; j < nums.length; j++) { if(nums[i] + nums[j] == target) { ans[0] = i; ans[1] = j; } } } return ans; } }