#include <iostream>
#include <iomanip>

#include <algorithm>
#include <string>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////
int L[100000];

int main(void){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed;//
	//cout << setprecision(7);//
	
	//そっちのマッチかーい
	int N;
	cin >> N;//[2,10^5]
	/*
	0 6×
	1 2
	2 5×
	3 5×
	4 4× 11
	5 5×
	6 6×
	7 3
	8 7×
	9 6×
	1か7を並べる
	2本と3本
	*/
	int num = N/2;
	rep(i,num){
		if( i == 0 && N%2 == 1){
			cout << "7";
		}else{
			cout << "1";
		}
	}
	cout << endl;

	return 0;
}