#include<iostream>
#include<stdio.h>
#include<vector>
#include<algorithm>

using namespace std;

int main(){
    int n;
    cin>> n;

    int cnt = 0;
    if(n%2==0){
        cnt = n/2;
    }else{
        cnt = (n-2)/2;
        cout<< 7;
    }
    for(int i=0; i<cnt; i++){
        cout<< 1;
    }


    return 0;
}