#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,a=0,b=0,i; cin>>n; for(i=1;i<=n;i++) { if(i%2!=0) a+=i; if(i%2==0) b+=i; } cout<<a<<" "<<b; return 0; }