#include<bits/stdc++.h> #define int long long using namespace std; signed main() { //freopen("relax.in","r",stdin); //freopen("relax.out","w",stdout); ios::sync_with_stdio(false); cin.tie(0);cout.tie(0); int n,m; cin>>n>>m; int pre=m; int suf=max(0ll,m-n+1); int num=min(n,m+1); int ans=(pre+suf)*num/2; //cout<<ans; int sum=n*m; //cout<<ans<<" "<<sum<<'\n'; int now=__gcd(ans,sum); cout<<ans/now<<'/'<<sum/now; }