Two Sum

TwoSum

public int[] twoSum(int[] numbers, int target) {
        int [] index = new int[2];
        if(numbers.length==0)
            return index;
        int N = numbers.length;
        HashMap<Integer,Integer> map = new HashMap<Integer, Integer>();
        for(int i=0;i<N;i++){
            map.put(numbers[i],i);
        }
        for(int i=0;i<N;i++){
            int index1 =i;
            int v1= numbers[i];
            int v2 = target-v1;
            if( map.containsKey(v2) && map.get(v2)!=i ){
                index[0]=index1+1;
                index[1]=map.get(v2)+1;
                return index;
            }
        }
        return index;
    }