#include<iostream>

using namespace std;

int main()
{
    int N;
    cin >> N;
    //0:6,1:2,2:5,3:5,4:4,5:5,6:6,7:3,8:7,9;6
    
    for(;;) {
        if(N%2!=0) {
            N = N-3;
            cout << 7;
        }
        else if(N-2>=0) {
            N = N-2;
            cout << 1;
        }
        else { break; }
    }
    cout << endl;

    return 0;
}