#include <stdio.h>
#include <algorithm>

using namespace std;

FILE *f=fopen("congr.in","r");
FILE *s=fopen("congr.out","w");;

int x,n,i,a,b,v1[600005],v2[600005];

int main()
{
	//srand(time(NULL));
	

	/*
	fscanf(f,"%d",&n);
	
	for(i=1;i<=2*n-1;i++)
	{	
		fscanf(f,"%d",&x);
		
		v1[i]=x%n;
		v2[i]=i;
	}
	
	x=0;
	
	for(i=1;i<=n;i++)
		x+=v1[i];
	
	while(x%n==0)
	{
		a=rand()%n; 
		b=rand()%(n-1); 
        
		b+=n; 
        
		x-=v1[a]; 
		x+=v2[b]; 
        
		swap(v1[a],v1[b]); 
		swap(v2[a],v2[b]); 
	} 
    
	for(i=1;i<=n;i++) fprintf(s,"%d ",v2[i]); 
	*/
	fclose(s);
	
	return 0;
}