#include using namespace std; typedef long long ll; constexpr int Inf = 2000000010; constexpr ll INF= 2000000000000000000; constexpr ll MOD = 1000000007; const double PI = 3.1415926535897; typedef pair P; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } ll mod(ll val, ll M) { ll res = val % M; if(res < 0) { res += M; } return res; } // N^P mod M(ただしM == -1の時はmodを取らない) template T RS(T N, T P, T M){ if(P == 0) { return 1; } if(P < 0) { return 0; } if(P % 2 == 0){ ll t = RS(N, P/2, M); if(M == -1) return t * t; return t * t % M; } if(M == -1) { return N * RS(N,P - 1,M); } return N * RS(N, P-1, M) % M; } int main() { int N; cin >> N; vector A(N); for(int i = 0;i < N;i++) { cin >> A.at(i); } vector B(N); for(int i = 0;i < N;i++) { cin >> B.at(i); } A.push_back(1); B.push_back(1); int ret = 0; for(int i = 0;i < N;i++) { if(A.at(i) != B.at(i) && A.at(i + 1) == B.at(i + 1)) { ret++; } } cout << ret << endl; }