#include <bits/stdc++.h>
#include <ranges>
namespace ra = std::ranges;
namespace vi = std::ranges::views;
using namespace std::string_literals;
using namespace std;
#include <cctype>

auto copy_reverse(auto const& s) noexcept -> auto
{
	auto tmp = s;
	ra::reverse(tmp);
	return tmp;
}

auto isPalindrome(string s) -> bool
{
	auto begin = s.cbegin();
	auto end = s.cend() - 1;
	auto const mid = ZZ
	for (; begin != end; ++begin, --end) {
		/*
		while (begin != s.end() && not isalnum(*begin)) ++begin;
		while (rbegin != s.rend() && not isalnum(*rbegin)) ++rbegin;
		*/
		auto const& f = char(toupper(*begin));
		auto const& l = char(toupper(*end));
		cout << "(" << f << ", " << l << ")\n";
	}
	cout << endl;
	return ra::equal(copy_reverse(s), s);
}

auto main() -> int
{
	auto s = "A man, a plan, a canal: Panama"s;
	cout << boolalpha << isPalindrome(s) << endl;
	s = "race a car"s;
	cout << boolalpha << isPalindrome(s) << endl;
	s = " "s;
	cout << boolalpha << isPalindrome(s) << endl;
	return 0;
}