# "Leetcode" permutations

Source: Internet
Author: User

Given A collection of numbers, return all possible permutations.

For example,
`[1,2,3]`The following permutations:
`[1,2,3]`,,,,, `[1,3,2]` `[2,1,3]` `[2,3,1]` `[3,1,2]` and `[3,2,1]` .

Reference article: http://blog.csdn.net/tuantuanls/article/details/8717262

The problem of the whole arrangement.

`1 classsolution{2  Public:3vector<vector<int>>permute (vector<int> &num) {4         intn=num.size ();5vector<vector<int>>result;6 7         if(n==1)8         {9 result.push_back (num);Ten             returnresult; One         } A  -vector<vector<int>>Post; -  thevector<int>cur; -vector<int>tmp; -  -          for(intI=0; i<n;i++) +         { -Cur=num; +Cur.erase (Cur.begin () +i); Apost=permute (cur); at              for(intj=0; J<post.size (); j + +) -             { -tmp=Post[j]; - Tmp.insert (Tmp.begin (), num[i]); - Result.push_back (TMP); -             } in         } -          to         returnresult; +     } -};`

"Leetcode" permutations

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