[LeedCode OJ]#46 Permutations

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题目链接:https://leetcode.com/problems/permutations/

题意:

给定一个数组,要求返回其所有全排列的情况

思路:

对于一个特定排列我们有一个求下一个全排列的函数,那就是next_permutation,运用这个函数这道题迎刃而解

class Solution
{
public:
    vector<vector<int> > permute(vector<int>& a)
    {
        vector<vector<int> > ans;
        sort(a.begin(),a.end());
        do
        {
            ans.push_back(a);
        }
        while(next_permutation(a.begin(),a.end()));
        return ans;
    }
};

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时间: 2024-10-08 13:42:05

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