1 Two Sum

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