Python脚本写写
2017-04-06 Two Sum
Question
Given an array of integers, return indices of the two numbers such that they add up to a specific target.
You may assume that each input would have exactly one solution, and you may not use the same element twice.
Example:
Given nums = [2, 7, 11, 15], target = 9,
Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].
Solution
class Solution(object):
def twoSum(self, nums, target):
"""
:type nums: List[int]
:type target: int
:rtype: List[int]
"""
num_dict = {}
for i_index in xrange(len(nums)):
i = nums[i_index]
i0 = target - i
if i0 in num_dict:
return [num_dict[i0], i_index]
num_dict[i] = i_index
return None
