This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
const int N = 1e6 + 1;
const int mod = 1e9 + 7;
template <typename T>
bool umx(T& a, T b) {
    return (a < b ? a = b, 1 : 0);
}
template <typename T>
bool umn(T& a, T b) {
    return (a > b ? a = b, 1 : 0);
}
void solve () {
    int n;
    cin >> n;
    vector<int> a(n);
    vector<int> b(n);
    for (int i = 0; i < n; ++i) cin >> a[i];
    for (int i = 0; i < n; ++i) cin >> b[i];
    for (int i = 0; i < n; ++i) {
        if (a[i] == b[i]) {
            cout << n << endl;
            return;
        }
    }
    cout << 0 << endl;
}
signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    //    freopen ("input.txt", "r", stdin);
//    freopen ("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int T = 1;
    while (T--) solve();
    return 0;
}
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