#include<bits/stdc++.h>

#define endl "\n"
// #define int long long

using namespace std;

using i64 = long long;
using u64 = unsigned long long;

constexpr int N = 5e5 + 10, M = 20;
constexpr int P = 1e9 + 7;
constexpr int INF = 1e9;

void solve() {
    int n;
    cin >> n;
    string s1, s2;
    cin >> s1 >> s2;
    reverse(s1.begin(), s1.end());
    reverse(s2.begin(), s2.end());
    int s1mod3 = (s1[0] - '0');
    int s2mod3 = (s2[0] - '0');
    auto sbt2 = s2.substr(n - 1);
    auto sbt1 = s1.substr(n - 1);
    if ((s1.back() == '2' || count(sbt1.begin(), sbt1.end(), '0') == sbt1.size())
            && (s2.back() == '2' || count(sbt2.begin(), sbt2.end(), '0') == sbt2.size())) {
        cout << 0 << endl;
        return;
    }
    if (s1mod3 == 1 || s2mod3 == 1) {
        cout << 1 << endl;
    } else {
        cout << 0 << endl;
    }
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int T = 1;
    // cin >> T;
    while (T--) {
        solve();
    }
}