#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
using namespace std;
typedef pair<int, int> pii;
#define rep(i,x) for(int i=0;i<(int)(x);i++)

int main(){
	int n, ans = 0;
	cin >> n;
	while (n>1) {
		if (n==3) {
			cout << 7;
			break;
		} else {
			cout << 1;
			n -= 2;
		}
	}
	cout << endl;
	return 0;
}