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public class Solution {

public int[] twoSum(int[] numbers, int target) {

int[] result = new int[2];

if(numbers == null || numbers.length < 2) return result;

HashMap<Integer,Integer> map = new HashMap<Integer, Integer>();

for(int i = 0; i < numbers.length; i++){

if(map.containsKey(target-numbers[i])){

result[0] = map.get(target-numbers[i])+1;

result[1] = i+1;

break;

} else {

map.put(numbers[i], i);

}

}

return result;

}

}