#include <avr/io.h>    			

int main(void) 
{
	
	DDRB = 0xFF;				
	DDRC = 0x00;				

	while(1)
	{
		if ((PINC &0b00100000))	
			PORTB = 0x55;		
		else
			PORTB = 0xAA;
	} 

	return 0;
}