> 程序仅供参考：
> #include <iostream>
> #include <string>
> #include <algorithm>
> #include <vector>
> using namespace std;
> int main()
> {
> 	string s;
> 	while(cin>>s&&s!="#"){
> 		if(next_permutation(s.begin(),s.end())) cout<<s<<endl;
> 		else cout<<"No Successor"<<endl;
> 	}
> 	return 0;
> }

能解释一下什么意思么?

next_permutation(s.begin(),s.end())