std::gcd+求最值

#include<iostream>
#include<algorithm>
using namespace std;

int main(){
    int a,b,c;
    cin>>a>>b>>c;
    int minus=min(min(a,b),c);
    int slice=max(max(a,b),c);
    int g=__gcd(slice,minus);
    minus/=g;
    slice/=g;
    cout<<minus<<'/'<<slice;
}