#include<stdio.h>
int gcd(int x, int y) {
	int z = y;
	while (x % y != 0)
	{
		z = x % y;
		x = y;
		y = z;
	}
	return z; 
}
int main() {
	int a, b, c;
	int d, e;
	scanf("%d %d %d", &a, &b, &c);
	d=a;
	if (b > d) d = b;
	if (c > d) d = c;
	e=a;
	if (b < e) e = b;
	if (c < e) e = c;
	 gcd(d,e);
	 printf("%d/%d", e, d);
	return 0;
}