#include <iostream>
#include <vector>

int sumStartEnd(int start, int end)
{
	int sum = 0;
	for(int i = start; i <= end; i++)
	{
		sum += i;
	}
	return sum;
}

int main()
{
	std::cout << "Krzysztof" << std::endl;
	for(int i = 700; i >= 200; i -= 13) std::cout << i << std::endl;
	std::vector <int> array = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
	// if SECOND means 0, 1, TWO
	std::cout << array[2] << std::endl;
	// if SECOND means 1, TWO
	std::cout << array[1] << std::endl;
	std::cout << sumStartEnd(0, 1000);

	std::string userName;
	std::cout << std::endl;
	getline(std::cin, userName);
	if(userName == "Jack") std::cout << "Hi Jack!" << std::endl;
	else std::cout << "Hello, " << userName << std::endl;

	for(int i = 0; i <= 100; i++)
	{
		if(i % 2 == 0) std::cout << i << " is an even number" << std::endl;
		else std::cout << i << " is an odd number" << std::endl;
	}

	bool flag = 1;
	for(int i = 0; i <= 100; i++)
	{
		if(flag) std::cout << i << " is an even number" << std::endl;
		else std::cout << i << " is an odd number" << std::endl;
		flag = -flag;
	}

	for(int i = 0; i <= 100; i += 2) std::cout << i << " is an even number " << std::endl;
	for(int i = 1; i <= 99; i += 2) std::cout << i << " is an odd number " << std::endl;

	for(int i = 1, j = 1; j <= 12; i++)
	{
		std::cout << i * j << " ";

		if(i == 12)
		{
			i = 1;
			j++;
			std::cout << std::endl;
		}
	}

	std::cout << std::endl;
	std::string sentence;
	getline(std::cin, sentence);
	std::vector <std::string> words;
	std::string temp;
	for(unsigned int i = 0; i < sentence.length(); i++)
	{
		if(sentence.at(i) == ' ' || i + 1 == sentence.length())
		{
			if(i + 1 == sentence.length()) temp.push_back(sentence.at(i));
			words.push_back(temp);
			temp = "";
		}else 	temp.push_back(sentence.at(i));

	}

	for(unsigned int i = 0; i < words.size(); i++)
	{
		std::cout << words[i] << std::endl;
	}

	int score;
	char project;
	std::vector <char> GRADES = {'F', 'C', 'B', 'A'};
	std::cin >> score;
	std::cout << std::endl;
	std::cin >> project;
	std::cout << std::endl;
	bool doneProject = 0;
	if(project == 'Y') doneProject = 1;
	if(score < 50) std::cout << GRADES[0 + doneProject];
	else if(score < 70) std::cout << GRADES[1 + doneProject];
	else if(score < 90) std::cout << GRADES[2 + doneProject];
	else std::cout << GRADES[3];


}