标签:res 使用 [1] array use number each add pre
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].
返回一个整形数组的两个索引,他们对应的数之和等于指定的目标值。
你可以假设这个目标值一定有解,但是不能使用数组中同一个数两次。
例如 nums=[2,7,11,15],target=9. 因为nums[0]+nums[1]=target.
所以return [0,1].
1 class Solution { 2 public: 3 vector<int> twoSum(vector<int>& nums, int target) { 4 unordered_map<int,int> hash; 5 vector<int> result; 6 for(int i=0;i<nums.size();++i){ 7 int theRest=target-nums[i]; 8 if(hash.find(theRest)!=hash.end()){ 9 result.push_back(hash[theRest]); 10 result.push_back(i); 11 return result; 12 } 13 hash[nums[i]]=i; 14 } 15 return result; 16 } 17 };
标签:res 使用 [1] array use number each add pre
原文地址:http://www.cnblogs.com/captzx/p/7090803.html