python leetcode practice

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preface:leetcode练习https://leetcode.com/problemset/algorithms/

question:1.Two Sum

Given an array of integers, find two numbers such that they add up to a specific target number.

The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that your returned answers (both index1 and index2) are not zero-based.

You may assume that each input would have exactly one solution.

Input: numbers={2, 7, 11, 15}, target=9
Output: index1=1, index2=2

coding:

class Solution:
    # @return a tuple, (index1, index2)
    def twoSum(self, num, target):
        index1 = -1
        index2 = -1
        num_dict = {}
        num_len =len(sum)
        for i in range(num_len):
            temp = {num[i]:i}
            num_dict.update{temp}
        for i in num_dict:
            if target-i in num_dict and num_dict[i]!=num_dict[target-i]:
                index1 = num_dict[i]
                index2 = num_dict[target-i]
                break
            else:
                print "without suitable answer"
        return (index1,index2)

python leetcode practice

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原文地址：http://blog.csdn.net/u010454729/article/details/44809047