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leetcode: 1. Two Sum

Difficulty

Easy

Discription

/**
 * Given an array of integers, return indices of the two numbers such that they add up to a specific target.
 *
 * You may assume that each input would have exactly one solution, and you may not use the same element twice.
 *
 * Example:
 *
 * Given nums = [2, 7, 11, 15], target = 9,
 *
 * Because nums[0] + nums[1] = 2 + 7 = 9,
 * return [0, 1].
 */

Solution

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