#include <stdio.h>

typedef struct rational
{
  int a;
  int b;
} RATIONAL;

int gcd(int a, int b)
{
  int r;

  r = a % b;
  while ( r != 0 )
  {
    a = b;
    b = r;
    r = a % b;
  }

  return b;
}

void reduce(RATIONAL *p)
{
  int c;
  c = gcd(p->a, p->b);

  p->a /= c;
  p->b /= c;
}

RATIONAL add(RATIONAL x, RATIONAL y)
{
  RATIONAL z;

  z.a = (x.a * y.b) + (y.a * x.b);
  z.b = x.b * y.b;

  reduce(&z);

  return z;
}

void print_r(RATIONAL x )
{
  reduce(&x);
  printf("%d/%d", x.a, x.b);
}

void scan_r(RATIONAL *p)
{
  scanf("%d%d", &(p->a), &(p->b));
}