#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
 int steps = 64, s, a, b, c;
 if(argc > 1) steps = atol(argv[1]);
 if(steps <= 0) exit(1);

 for(s = 1; s < steps; s++)
    {
     a = s;
     b = steps;
     c = 2;
     while(c <= a)
        {
         if(a % c == 0 && b % c == 0)
            {
             a /= c;
             b /= c;
             c = 2;
             continue;
            }
         c++;
        }
     printf("%d/%d: %f\n", a, b, (double)a/(double)b);
    }

 return 0;
}