def twoSum(numbers, target):
    """
    :type numbers: List[int]
    :type target: int
    :rtype: List[int]
    """
    if target >= 0:
        last = len(numbers)-1
    else:
        last = 1
    # print( last)
    while last > 0:
        if numbers[last] > target and target > 0:
                for i in range(len(numbers)):
                    last -= 1
                    if numbers[last] < target:
                        break
        for x in range(len(numbers)):
            if numbers[x] + numbers[last] == target:
                return [x+1, last+1]
        if target >= 0:
            last -= 1
        else:
            last += 1


print(twoSum([2,7,11,15], 9))
print(twoSum([-1,0], -1))
# print(twoSum([5,25,75], 100))