Submultimi_2

#include <iostream>
using namespace std;
int n,k,r,ak,bk,sumak,ar,br,sumar,i,j,l=0;

int main()
{
    cin>>n>>k>>r;
    if(n%2==0)
        cout<<n/2<<'\n';
    else
        cout<<(n-1)/2<<'\n';
    ak=(k*(k-1))/2;
    bk=ak+k-1;
    ar=(r*(r-1))/2;
    br=ar+r-1;
    sumak=((ak+bk)*k)/2;
    sumar=((ar+br)*r)/2;
    cout<<(sumak+sumar)/(k+r)<<'\n';
    i=ar;
    j=br;
    while(i<j)
    {
        cout<<i<<' ';
        ++i;
        cout<<i<<' ';
        ++i;
        if(j>i)
            cout<<j<<' ',--j;
    }
    if(i==j)
        cout<<i<<' ';
    return 0;
}