/* p5.c */

#include <stdio.h>

int main()
{
   int counter;    // the number of three's we've seen
   int value;      // the value just read
   int howmany;    // howmany values were read


   counter = 0;
   howmany = fscanf(stdin, "%d", &value);

   while (howmany == 1)
   {
      if (value == 3)
         counter = counter + 1;
      howmany = fscanf(stdin, "%d", &value);
   }

   fprintf(stdout, "The number of 3's was %d \n", counter);
   return(0);
}