#include <iostream>
using namespace std;
typedef signed long long ll;
 
#define REP(i,n) for (int i = 0; i < (n); i++)
#define RREP(i,n) for (int i = (n)-1; i >= 0; i--)
#define FOR(i,s,n) for (int i = (s); i < (n); i++)
#define RFOR(i,s,n) for (int i = (n)-1; i >= (s); i--)
 
 
int main() {
	
	int N;
	cin >> N;
	
	int c = N/2;
	
	if(N%2==0){
		while(c>0){
			cout << "1";
			c--;
		}
	}else{
		cout << 7;
		while(c>1){
			cout << "1";
			c--;
		}
	}cout << endl;
 
	return 0;
}