#include <limits>
#include <iostream>
int main()
{
    //9223372036854775807
    //0x7fffffffffffffff
    long long l1 = std::numeric_limits<long long>::max();
    std::cout << l1 << "\n";

    // convert the long long to double
    // The 0x7fffffffffffffff is not representable exactly as double
    // and the final result is greater than the original value.
    // It means that we will hit UB when going back to long long.
    double d = (double)l1;

    // In our case d and long long max are EQUAL so we will NOT enter
    // the branch.
    if (d > (double)std::numeric_limits<long long>::max()) {
        std::cout << "safe\n";
    }

    if (d < std::numeric_limits<long long>::min()) {
        std::cout << "safe\n";
    }

    // And hence BOOM! We hit the UB.
    //-9223372036854775808
    //0x8000000000000000
    long long l2 = (long long)d;
     std::cout << l2 << "\n";

    return 0;
}