//-----------------------------------------------------------------------
//	File:		jump.cc
//	Description:	Calculate Neo's Leap
//	Author:		Chau-Wen Tseng (tseng@cs.umd.edu)
//-----------------------------------------------------------------------

#include <stdlib.h>
#include <iostream.h>
#include <assert.h>

//-----------------------------------------------------------------------
//  main
//-----------------------------------------------------------------------

int main()
{
	int x_speed, y_speed, distance;
	int time, x_pos, y_pos;

	cin >> x_speed;
	cin >> y_speed;
	cin >> distance;

	time = 0;
	x_pos = 0;
	y_pos = 0;

	while ((y_speed >= 0) || (y_pos > 0)) {
		x_pos += x_speed;
		y_pos += y_speed;
		y_speed -= 5;  // decrease vertical speed
		cout << x_pos << " " << y_pos << endl; 
	} 

	if ((x_pos >= distance-3) && (x_pos <= distance+3))
		cout << "yes" << endl;
	else
		cout << "no" << endl;

}