#include<bits/stdc++.h>
using namespace std;
#define el "\n"
#define ll long long
#define ull unsigned long long
#define se second
#define fi first
#define be begin()
#define en end()
#define Faster cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
ll f[1000];
int main()
{
    Faster;
    ll n; cin >> n;
    f[0] = 0;
    f[1] = 1;
    for(int i = 2; i <1000; i++)
    {
        f[i] = f[i-1] + f[i-2];
        if(f[i] == n || n == 0)
        {
            cout << "yes";
            return 0;
        }
        if(f[i] > n)
        {
            cout << "no";
            return 0;
        }
    }
    return 0;
}