#include <stdio.h>



unsigned long cteni_radku(unsigned long cislo, unsigned long hodnota)

  cislo = getchar();

  if (cislo >= '0' && cislo <= '9'){

      unsigned long hodnota, cislo;

       while ((cislo = getchar()) != '\n' && cislo != EOF)

       hodnota = (hodnota * 10) + (cislo - '0');
       return hodnota;

  }
int  main()
{
  printf("%d",cteni_radku);


}