int main ()
{
printf("%d\n",ReverseNumber(5170984));
printf("%d\n",ReverseNumber(406567));
printf("%d\n",ReverseNumber(368750));
printf("%d\n",ReverseNumber(2369510));
printf("%d\n",ReverseNumber(2183293));
return 0;
}
int main(){
std::vector<int> palindrome(899);
auto i = 100;
std::cout << "Generating list of numbers to multiply..." << std::endl;
std::generate(palindrome.begin(), palindrome.end(), [&](){return i++; });
std::vector<int> solutions;
auto k = 0;
std::cout << "Checking palindromicity of products..." << std::endl;
for (int a = 898; a > 0; a--){
for (int b = 898; b > 0; b--){
if (ReverseNumber((palindrome[a] * palindrome[b])) == (palindrome[a] * palindrome[b])){
solutions.push_back(palindrome[a] * palindrome[b]);
}
}
}
auto trueSolution = 0;
std::cout << "Determining largest palindromic number..." << std::endl;
for (int j = 0; j < solutions.size(); j++){
if (solutions[j] > trueSolution){
trueSolution = solutions[j];
}
}
std::cout << "The answer is: " << trueSolution << std::endl;
system("Pause");
return 0;
}
int ReverseNumber(int n, int partial = 0){
if (n == 0)
return partial;
return ReverseNumber(n / 10, partial * 10 + n % 10);
}