#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

using namespace std;
typedef long long ll;
typedef pair<ll, ll> Pr;

int N;

int main()
{
	cin >> N;
	
	int seven = N / 3;
	int one;
	if (N % 3 == 0)one = 0;
	else {
		one = (N % 3) / 2;
		if (one == 0) {
			seven--;
			one+=2;
		}
	}
	for (int i = 0; i < seven; i++)
		cout << 7;
	for (int i = 0; i < one; i++)
		cout << 1;
	cout << endl;
	return 0;
}