#include<iostream>
#include<algorithm>
using namespace std;
using lint=int64_t;

int main()
{
	int N;

	cin >> N;
	
	for(int i=0;i<N/2;i++)
	{
		if(i==0 && N%2==1)
			cout << 7;
		else 
			cout << 1;
	}
	cout << endl;
	return 0;
}