using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
class Program
{
class Permutation
{
private void swap(ref char a, ref char b)
{
if (a == b) return;
a ^= b;
b ^= a;
a ^= b;
}
public void setper(char[] list)
{
int x = list.Length - 1;
go(list, 0, x);
}
private void go(char[] list, int k, int m)
{
int i;
if (k == m)
{
Console.Write(list);
Console.WriteLine(" ");
}
else
for (i = k; i <= m; i++)
{
swap(ref list[k], ref list[i]);
go(list, k + 1, m);
swap(ref list[k], ref list[i]);
}
Console.ReadLine();
}
}
class Class1
{
static void Main()
{
Permutation p = new Permutation();
string c = "123456";
char[] c2 = c.ToCharArray();
p.setper(c2);
}
}
}
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