#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int n, div;
    cin >> n;
    string s = "";
    div = n/2;
    if (n%2){
        s += "7";
        div--;
    }
    while (div){
        s += "1";
        div--;
    }
    cout << s << endl;
}