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

int main(){
	int n;
	cin >> n;
	int one = 0,seven = 0;
	if(n % 2 == 0) one = n / 2;
	else{
		seven = n / 3;
		n -= seven * 3;
		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;
}