public class a_01 {
    public int[] twoSum(int[] nums, int target) {
        for(int i = 0; i < nums.length-1; i++) {
            for (int j = i+1; j < nums.length; j++) {
                if (nums[i] + nums[j] == target)
                    return new int[]{i,j};
            }
        }
        throw new IllegalArgumentException("No two sum solution");
    }
}