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#include <iostream>
#include <algorithm>

using namespace std;

int n,i,j,tab[3001],tab1[3001],tmp[3001],tmpr[3001],res1[3001],res2[3001],rind,rind2,maxpath,currpath,wyn,pow2,first,firstind,tmpx;


void qs( int tab[],int tab2[], int left, int right )
{
    int i = left;
    int j = right;
    int x = tab[( left + right ) / 2 ];
    do
    {
        while( tab[ i ] < x )
             i++;
        
        while( tab[ j ] > x )
             j--;
                     
        if( i <= j )
        {
            swap( tab[ i ], tab[ j ] );
            swap( tab2[ i ], tab2[ j ] );
            i++;
            j--;
        }
    } while( i <= j );
    if( left < j ) qs( tab,tab2, left, j );
    if( right > i ) qs( tab,tab2, i, right );
}


int main(){
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d",&tab[i]);
		tmp[i]=tab[i];
		tmpr[i]=i;
	}
	qs(tmp,tmpr,0,n-1);
	for(i=0;i<n;i++){
		tab[tmpr[i]]=i;
	}
	
	for(i=0;i<n;i++){
	//	printf("%d ",tab[i]);
		tmp[i]=false;
	}
	maxpath=0;
	wyn=0;
	pow2=1;
	// policz wynik
	for(i=0;i<n;i++){
		currpath=0;
		j=i;
		while(!tmp[j]){
			tmp[j]=true;
			j=tab[j];
			currpath++;
		}
		if(currpath>maxpath)maxpath=currpath;
	}
//	printf("maxp %d\n",maxpath);
	if(maxpath>2){
		printf("%d\n",2);
	}
	else if(maxpath==2){
		printf("%d\n",1);
	}
	else{
		printf("%d\n",0);	
		return 0;	
	}
	// liczswapy
//	while(wyn--){
	if(maxpath>2){
		for(i=0;i<n;i++)
			tmp[i]=false;
		rind=rind2=0;
		for(i=0;i<n;i++){
			currpath=0;
			j=i;
			rind2=rind;
			while(!tmp[j]){
				tmp[j]=true;
				res1[rind2++]=tab[j];
				j=tab[j];
				currpath++;
			}
			if(currpath>2){
				while(rind2>rind){
					res2[rind++]=res1[--rind2];
				}
				rind=rind2;
			}
		}
		printf("%d\n",rind*2);
		
		for(i=0;i<rind;i++){
			printf("%d ",res1[i]+1);
		}
		for(i=rind-1;i>0;i--){
			printf("%d ",res2[i]+1);
		}
		printf("%d\n",res2[0]+1);
		
		for(i=0;i<rind;i++){
			tmpx = tab[res1[i]];
			tab[res1[i]]=tab[res2[i]];
			tab[res2[i]]=tmpx;
		}
			// print
		
	}
	
	if(true){
		rind=0;
		for(i=0;i<n;i++)
			tmp[i]=false;
		
		for(i=0;i<n;i++){
			j=i;
			first = -1;	
			while(!tmp[j]){
				tmp[j]=true;
				if(first == -1){
					first = tab[j];
					firstind = j;
				}
				else{
					tab1[firstind] = tab[j];
					tab1[j]=first;
					first = -1;
					res1[rind]=firstind;
					res2[rind++]=j;
				}
				j=tab[j];
			}
			if(first != -1){
				tab1[firstind]=first;
			}
		}
		
		for(i=0;i<n;i++){
			tab[i]=tab1[i];
		}
		printf("%d\n",rind*2);
		
		for(i=0;i<rind;i++){
			printf("%d ",res1[i]+1);
		}
		for(i=rind-1;i>0;i--){
			printf("%d ",res2[i]+1);
		}
		printf("%d\n",res2[0]+1);
		
		
	//	for(i=0;i<n;i++){
//			printf("%d ",tab[i]);
		//}
		printf("\n");
	}
//	}
	
}