#include <iostream>
#include <gmpxx.h>

int main() {
    // Version utilisant la syntaxe C++
    // ainsi que l'opérateur '*'
    
    // Declare an arbitrary precision integer class
    mpz_class factorial = 1;

    // Loop from 1 to 50, multiplying 'factorial' by the current number
    for (int i = 1; i <= 50; i++) {
        factorial *= i;
    }

    // Print the result. The overloaded << operator handles printing
    std::cout << "The factorial of 50 is:\n" << factorial << std::endl;

    return 0;
}