#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>
//#include<bits/stdc++.h>


using namespace std;
int x[100008];
//int y[100008];
int z[100008];

int main(){
int n;
cin>>n;
int g=n/2;
for(int i=0;i<g;i++){
	if(i!=0)cout<<"1";
	else{
		if(n%2)cout<<"7";
		else cout<<"1";
	}
}

cout<<endl;

	return 0;
}