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- #include <bits/stdc++.h>
- using namespace std;
- int main() {
- int n;
- cin >> n;
- vector<int> F(n);
- vector<int> S(n);
- vector<int> P(n);
- int ans = 1;
- for (int i = 0; i < n; i++) {
- cin >> F[i];
- F[i]--;
- }
- for (int i = 0; i < n; i++) {
- cin >> S[i];
- S[i]--;
- }
- P[F[0]]=-1;
- for (int i = 1; i < n ; i++) {
- P[F[i]] = F[i - 1];
- }
- for (int i = 1; i < n ; i++) {
- if (P[S[i]] != S[i - 1]) {
- ans++;
- }
- }
- cout << ans;
- }
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