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#include <cstdio>
#include <iostream>
#include <vector>
using namespace std;

 int fib[46]={1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597,2584,4181,6765,10946,17711,28657,46368,75025,121393,196418,317811,514229,832040,1346269,2178309,3524578,5702887,9227465,14930352,24157817,39088169,63245986,102334155,165580141,267914296,433494437,701408733,1134903170};
pair<int, int>  V[1000];
		
int main()
{
	int k;
	cin>>k;
	int l=k;
	int ind;
	if (k==1)
	{
		cout<<"2\n2 -1\n-1 -1\n";
		return 0;
	}
    
    V[1]=make_pair(-1,-1);
    V[2]=make_pair(1,-1);
   
   
   for (int i=0; i<46; i++)
	{
		if (fib[i]>l)
		{
			l-=fib[i-1];
			ind=i;
			break;
		}
	}
    
    for (int i=3; i<=ind; i++)
    {
    	V[i]=make_pair(i-2,i-1);
    }
    int W=ind;
    
    while(l>0)
    {
    	for (int i=0; i<45; i++)
		{
			if (fib[i]>l)
			{
				l-=fib[i-1];
				ind=i-1;
				break;
			}
		}
		V[W+1]=make_pair(W,ind+1);
		W++;
    }
    cout<<W<<"\n";

    for (int i=1; i<=W; i++)
    {
    	int h=i;
    	if (i==1)
    		h=W;
    	else 
    		if (i==W)
    			h=1;
    	
    	int A=V[h].first;
    	int B=V[h].second;
    	if (A==1)
    		A=W;
    	else
    		if (A==W)
    			A=1;
    	if (B==1)
    		B=W;
    	else
    		if (B==W)
    			B=1;
    	cout<<A<<" "<<B<<"\n";
    }
   
    return 0;
}