The Sum of

Source: Internet
Author: User

1. Title

The Sum of

2. Http Address

3. The question

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

The function twosum should return indices of the numbers such that they add up to the target, where index1 must is Les S than Index2. Please note that your returned answers (both Index1 and INDEX2) is not zero-based.

You may assume this each input would has exactly one solution.

Input: numbers={2, 7, one, A, target=9
Output: index1=1, index2=2

4 My Code (AC)

1 //Accepted time O (n); space o (n);2      Public Static int[] Twosum (int[] Nums,inttarget) {3     4map<integer,integer> map =NewHashmap<integer,integer>();5             intkey;6             intFindKey;7             int[] re =New int[2];8              for(inti = 0; i < nums.length; i++)9             {TenKey =Nums[i]; OneFindKey = target-key; A                  -                 if(Map.containskey (findkey)) -                 { theRe[0] =i; -RE[1] =Map.get (findkey); - Arrays.sort (re); -                     returnre; +}Else{ - Map.put (key,i); +                 } A                  at                  -             } -             return NULL; -}

The Sum of

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