class Solution:
def twoSum(self, numbers, target):
"""
:type numbers: List[int]
:type target: int
:rtype: List[int]
"""
first = 0
second = len(numbers) - 1
while numbers[first] + numbers[second] != target:
if numbers[first] + numbers[second] > target:
second -= 1
else:
first += 1
return [first+1, second+1]