#include <bits/stdc++.h>
#pragma GCC optimize(2)

// using namespace std;

using i64 = long long;
using u32 = unsigned int;
using u64 = unsigned long long;

void solve() {
    int n;
    std::cin >> n;
    std::string s1, s2;
    std::cin >> s1 >> s2;
    int st = 1;
    if ((s1[0] == '1' || s2[0] == '1') && (s1[n - 1] == '1' || s2[n - 1] == '1')){
        std::cout << 1 << "\n";
    }else{
        std::cout << 0 << "\n";
    }
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    // std::cout << std::fixed << std::setprecision(10); // 固定输出精度
    int t = 1;
    // std::cin >> t;

    while (t--) {
        solve();
    }
    

    return 0;
}