#include <iostream>

using namespace std;

int main()
{
    cout<<"a= "; int a; cin>>a; cout<<endl;
    while(a)
    {
        cout<<"a= "<<a; cout<<endl;
        cout<<"a=a+1"<<" sau a="<<a-1<<"+1";
        a=a-1; cout<<endl;
    }
    return 0;
}