#include <bits/stdc++.h>
using namespace std;

int main(){
	int n;
	cin >> n;
	if(n == 4){
		cout << 11 << endl;
		return 0;
	}	
	int seven = n / 3;
	n -= seven * 3;
	int one = n / 2;
	for(int i = 0; i < seven; i++) cout << 7;
	for(int i = 0; i < one; i++) cout << 1;
	cout << endl;		
	return 0;
}