#include <iostream>
using namespace std;
int find(int b[],int m,int n){
	int i;
	for(i=1;i<=m;i++){
		if(b[i]==n)
		return i;
	}
}
int main() {
int n,p,count,counter,found,i,j,k,final;
while(scanf("%d",&n)!=EOF){
	final=0;
	int a[n+1],b[n+1],c[n+1][n+1];
	for( i=1;i<=n;i++){
		scanf("%d",&a[i]);
	}
	for( j=1;j<=n;j++){
		scanf("%d",&b[j]);
	}
	for( i=1;i<=n;i++){
		counter=0;
		count=0;
		for(j=i;j<=n;j++){
 
			if(i==j)
			c[a[i]][a[i]]=0;
			else
			{c[a[i]][a[j]]=1;
			counter++;
			c[a[j]][a[i]]=0;
			}
		}
		p=a[i];
		found=find(b,n,p);
		for( k=found+1;k<=n;k++){
			if(c[a[i]][a[k]]==1){
			c[a[i]][a[k]]=0;
			count++;
			}
		}
		final+=(counter-count);
	}
	cout<<final<<endl;
}
	return 0;
}
 

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

NQoxIDIgMyA0IDUKMyAxIDIgNSA0CjUKMyAxIDIgNSA0CjEgMiAzIDQgNQo1CjMgMSAyIDUgNAo1IDMgMiAxIDQK

5
1 2 3 4 5
3 1 2 5 4
5
3 1 2 5 4
1 2 3 4 5
5
3 1 2 5 4
5 3 2 1 4