Two Sum

26 Mar 2020

package array;

import java.util.HashMap;

public class TwoSum
{
    public int[] twoSum(int[] nums, int target)
    {
        HashMap<Integer, Integer> map = new HashMap<>();

        for (int i = 0; i < nums.length; i++)
        {
            if (map.containsKey(target - nums[i]))
            {
                return new int[]{map.get(target-nums[i]), i};
            }
            map.put(nums[i], i);
        }

        return null;
    }
}