#include <bits/stdc++.h>
using namespace std;

void waruni(int N){
	int i;
	while(N>3){
		cout<<1;
		N-=2;
	}
}

int main() {
	int N;
	cin>>N;
	if(N%2){
		cout<<7;
	}else{
		cout<<1;
	}
	waruni(N);
	return 0;
}