[ssl1280] full arrangement

analysis ：

$next\_permutation$

CODE：

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#define reg register
using namespace std;
typedef long long ll;
int n,a[11];
int main(){
    
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		a[i]=i;
	sort(a+1,a+n+1);
	do{
    	
		for(int i=1;i<=n;i++)
			printf("%d ",a[i]);
		printf("\n");
	}while(next_permutation(a+1,a+n+1));	
	return 0;
}