#include<iostream>
using namespace std;

int main(){
    int n;
    cin >> n;
    if(n > 2 && n%2 == 1){
        cout << "7";
        n -= 3;;
    }
    for(int i = 0; i < n/2; i++){
        cout << "1";
    }
    cout << endl;
    return 0;
}