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#include<bits/stdc++.h>
using namespace std;
int tab[107];
int main()
{
    for(int i=32;i<=98;i+=2)
    {
        tab[i]=i+2;
    }
    int k;
    cin>>k;
    int z=1;
    cout<<100<<"\n";
    for(int i=30;i>=0;i--)
    {
        if(k>=(1<<i))
        {
            tab[z++]=100-(i*2);
            k-=(1<<i);
        }
    }
    for(int i=1;i<=30;i++)
    {
        if(tab[i]==0)
        {
            cout<<i+1<<" "<<-1<<"\n";
        }
        else
            cout<<i+1<<" "<<tab[i]<<"\n";
    }
    cout<<-1<<" "<<-1<<"\n";
    cout<<-1<<" "<<-1<<"\n";
    for(int i=33;i<=99;i++)
    {
        if(tab[i]==0)
        {
            cout<<i+1<<" "<<-1<<"\n";
        }
        else
            cout<<i+1<<" "<<tab[i]<<"\n";
    }
    cout<<-1<<" "<<-1;
}