#include <cmath>
#include <cstdlib>
#include <iomanip>
#include <iostream>

#include <algorithm>
#include <bitset>
#include <numeric>
#include <vector>

int sums_main(int argc, char** argv) {

	int n{};

	if (argc >= 2) {
		n = std::atoi(argv[1]);
	} else {
		std::cin >> n;
	}

	int sum{};
	for (int i = 1; i <= n / 2; ++i) {
		if (n % i == 0) {
			sum += i;
			std::cout << "  " << std::setw(3) << std::right << i << '\n';
		}
	}
	std::cout << "---\n= " << sum << '\n';
	if (n == sum) {
		std::cout << n << " is perfect\n";
	} else if (n < sum) {
	}
	return 0;
}

std::ostream& repeat(std::ostream& os, char ch, int count) {
	for (int i{}; i < count; ++i) {
		os << ch;
	}
	return os;
}

int triangles_main(int argc, char** argv) {

	int n{};

	if (argc >= 2) {
		n = std::atoi(argv[1]);
	} else {
		std::cin >> n;
	}

	std::string fills = " * *";
	if (argc >= 3) {
		fills = argv[2];
	}
#if 0
	{
		int z = 1;

		for (int i = 0; i < n / 2; i++) {
			for (int j = n / 2; j > i; j--) {
				std::cout << " ";
			}
			std::cout << "*";

			if (i != 0) {
				for (int k = 1; k <= z; k++) {
					std::cout << " ";
				}
				std::cout << "*";
				z += 2;
			}
			std::cout << std::endl;
		}
		for (int i = 0; i < n; i++) {
			std::cout << '*';
		}
		std::cout << '\n';
	}
#endif
	for (int pre = (n - 1) / 2, mid = -(n % 2); pre; --pre, mid += 2) {
		repeat(std::cout, fills[0], pre) << fills[1];
		if (mid >= 0) {
			repeat(std::cout, fills[2], mid) << fills[1];
		}
		repeat(std::cout, fills[0], pre) << '\n';
	}
	std::cout << fills[1];
	repeat(std::cout, fills[3], n - 2) << fills[1] << '\n';

	return 0;
}

int name_main(int, char**) {
	std::string name;
	do {
		std::cout << "Please enter the name for the account: ";
		getline(std::cin, name);
		bool valid_name = not name.empty();
		for (std::size_t i = 0; i < name.length(); i++) {
			if (name[i] != ' ' and not isalpha(name[i])) {
				std::cout << "Invalid name - please only use letters and spaces!\n";
				valid_name = false;
				break;
			}
		}
		if (valid_name) {
			name[0] = toupper(name[0]);
			std::cout << "Name for the account is: " << std::quoted(name) << '\n';
		}
	} while (std::cin);
	return 0;
}

int primes_main1(int, char**) {
	long long sum = 0;
	for (int n = 3; n < 200; n += 2) {
		for (int d = 3; d < std::sqrt(n) + 1; d += 2) {
			if (n % d == 0) {
				// Python "break"
				goto skip;
			}
		}
		// Python "else"
		{ sum += n; }
	skip:;
	}
	std::cout << sum << '\n';
	return 0;
}

int primes_main(int, char**) {
	long long sum = 0;
	for (int n = 3; n < 200; n += 2) {
		[&] {
			for (int d = 3; d < std::sqrt(n) + 1; d += 2) {
				if (n % d == 0) {
					return;
				}
			}
			sum += n;
		}();
	}
	std::cout << sum << '\n';
	return 0;
}

namespace {
class Class {
	int a;
};
} // namespace
const std::type_info& mangle2() { return typeid(Class); }