#include <iostream>
#include <iomanip>
#include <climits>

int main()
{
    std::string s = "abcdefghijklmnopqrstuvwxyz0123456789";
    
    bool used[1 << CHAR_BIT]{};
    bool all_unique = true;
    for (auto x : s)
    {
        if (used[static_cast<unsigned char>(x)])
        {
            all_unique = false;
            break;
        }
        used[static_cast<unsigned char>(x)] = true;
    }

    std::cout << std::boolalpha << all_unique << '\n';
}