#include <iostream>
int main()
{
	std::cout << "wirte two numbers:" << std::endl;
		int start = 0, end = 0;
		std::cin >> start >> end;
	int sum = 0;
	while (start <= end)  {
		sum += start;
		++start;
	}
	std::cout << "Sum of 1 to 10 inclusive is "
		<< sum << std::endl;
	return 0;
}