#include <iostream>
#include <vector>
using namespace std;

int main(void){
//input
	int match; cin >> match;
//calc
	vector<int> max;
	if(match % 2 == 0){
		for(int i=0;i<match / 2;i++){
			max.push_back(1);
		}
	}else{
		for(int i=0;i<match / 2;i++){
			if(i == 0){
				max.push_back(7);
			}else{
				max.push_back(1);
			}
		}
	}
//output
	for(int i=0;i<max.size();i++){
		cout << max.at(i);
	}
	cout << endl;
}