include[HTML_REMOVED]
include[HTML_REMOVED]
include[HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
const int N=10;
int n;
int st[N];
bool used[N];
void dfs(int u)
{
if(u>n)
{
for(int i=1;i<=n;i++)
printf(“%d “,st[i]);
puts(“”);
return;
}
for(int i=1;i<=n;i++)
if(!used[i])
{
st[u]=i;
used[i]=true;
dfs(u+1);
st[u]=0;
used[i]=false;
}
}
int main()
{
scanf(“%d”,&n);
dfs(1);
return 0;
}