#include <avr/io.h>          
  
  int main(void) 
  {  
    ddrb = ddrb & 0b11011111;    
    ddrc = ddrb | 0b10000000;    
    
    while (1)
    {
      if(pinb & 0b00100000)
        portc = portc | 0b10000000;    
      else
        portc = portc & 0b01111111;  
    }
    
    return 0;
  }