#include <iostream>
#include <vector>

using namespace std;
typedef long long ll;
int main(void){
    // Here your code !
    int N;
    cin >> N;
    
    ll count=0;
    ll total;
    vector<int> val;
    val.push_back(5);
    total = 5;
    
    while(true){
        int i=1;
        while(i<val.size() && val[i]==5){
            val[i]=3;
            total += 1;
            i++;
        }
        if(i==val.size()){
            val.push_back(3);
            total += 3;
        }else{ /* 3 */
            val[i] = 5;
            total += 2;
        }
        total %= 3;
        if(total%3==0){
            count++;
            if(count == N){
                for(int i=val.size()-1;i>=0;i--){
                    cout << val[i];
                }
                cout << endl;
                exit(0);
            }
        }
    }
}