#include<bits/stdc++.h> using namespace std; int main(){ int n,i,y,b; int o=0; int l=0; int p=0; int k=0; cin>>n; for(int i=0;i<=n;i++){ if(i%2!=0){ p+=i; } if(i%2==0){ y+=i; } } cout<<p<<"\\"<<y; return 0; }