#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using mint = atcoder::modint1000000007;

int main(){
	int n;
	cin>>n;
	if(n==1){
		cout<<"1\n";
		return 0;
	}
	vector<ll> fb(2);
	fb.at(0)=1,fb.at(1)=1;
	int j=2;
	while(1){
		fb.push_back((fb.at(j-2)+fb.at(j-1))%n);
		if(fb.at(j)==0){
			cout<<j+1<<endl;
			return 0;
		}
		j++;
	}
}