#2过不去，求帮助

#include<bits/stdc++.h>
using namespace std;

int main(){
    int a,b,c,maxn,minn;
    cin >> a >> b >> c;
    maxn = max(a,max(b,c));
    minn = min(a,min(b,c));
    maxn = maxn / __gcd(maxn,minn);
    minn = minn / __gcd(maxn,minn);
    cout << minn << '/' << maxn;
    return 0;
}

（蒟蒻码风不好勿喷）