#include "bits/stdc++.h"
using namespace std;

int main(){
int n;
cin >>n;
while(1){
    if(n>=3){n-=3;
    cout <<7;
    }
    else break;
}
while(1){
    if(n>=2){n-=2;
    cout <<1;
    }
    else break;
}
cout <<endl;
}