#include <iostream>
#include <sstream>
#include <math.h>
#include <stack>
#include <set>
#include <algorithm>
#include <string>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <vector>
using namespace std;

#define INF (1 << 30)
#define INFLL (1LL << 60)

int main() {
	int n;
	string str;
	cin >> n;
	if(n % 2 == 0){
		for(int i = 0;i < n/2;i++) str += "1";
	}else{
		str += "7";
		for(int i = 0;i < n/2-1;i++) str += "1";
	}
	cout << str << endl;
	return 0;
}