#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a;i < n;i++)
using namespace std;

int main(){
    int n; cin >> n;
    if(n % 2 == 0){
        rep(i,0,n/2){
            printf("1");
        }
        printf("\n");
    }else{
        printf("7");
        n -= 3;
        rep(i,0,n/2){
            printf("1");
        }
        printf("\n");
    }
}