PKU 1146 ID Codes

ID Codes

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main()
{
    string code;
    while ( cin>>code, code!="#" )
        if ( next_permutation( code.begin(), code.end() ) )
            cout << code << endl;
        else
            cout << "No Successor" << endl;
    return 0;
}