#include<iostream>
#include<algorithm>

using namespace std;

int main(){

	int mnum[10]={6,2,5,5,4,5,6,3,7,6};
	int N;

	cin>>N;

	while(N!=0){
		if(N%2==1&&N>=3){
			cout<<"7";
			N-=3;
		}
		else if(N/2>=1){
			cout<<"1";
			N-=2;
		}
		else break;
	}
	cout<<endl;
}