#include<stdio.h>
int main() 
{
    int n, m, i, j, a[100], z;
    z = 0;

    scanf_s("%d", &n);
    for (j = 1; j <=n; j++) {
        scanf_s("%d",&a[j]);
    }
    for (i = 1; i <= n; i++)
    {
        scanf_s("%d", &m);
        if (a[i] ==m )
        {
            z++;
        };
        printf("%d", z);
        return 0;
    }
}