#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<vector>
using namespace std;
using i32 = int_fast32_t;
using i64 = int_fast64_t;
#define rep(i, n) for (i32 i = 0; i < (i32)(n); i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using P = pair<i64,i64>;

int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
i32 n;
cin >> n;
vector<i32> a(n),b(n);
rep(i,n) cin >> a[i];
rep(j,n) cin >> b[j];
i32 cnt = 0;
i32 tmp = 0;
rep(i,n){
    if(a[i] != b[i])tmp++;
    else tmp = 0;
    if(tmp == 1)cnt++;
}
cout << cnt << endl;
}