题目:
输入一个字符串,打印出该字符串中字符的所有排列。你可以以任意顺序返回这个字符串数组,但里面不能有重复元素。
示例:
输入:s = "abc"
输出:["abc","acb","bac","bca","cab","cba"]
题解:
全排列
class Solution {
public:
vector<string> permutation(string s) {
sort(s.begin(),s.end());
vector<string>ans;
set<string>ss;
do
{
if(!ss.count(s))
{
ss.insert(s);
ans.push_back(s);
}
}while(next_permutation(s.begin(),s.end()));
return ans;
}
};