WA点：#2

#include<iostream>
using namespace std;
int a,b,c,a1,b1;
int gcd(int x,int y){
    return y?gcd(y,x%y):x;
}
int main(){
    scanf("%d%d%d",&a,&b,&c);
    a1=min(a,min(b,c));
    b1=max(a,max(b,c));
    a1/=gcd(a1,b1);
    b1/=gcd(a1,b1);
    printf("%d/%d",a1,b1);
    return 0;
}