#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
    // less than 3
    if(N==2) { cout << 1 << endl; }
    else if(N==3) { cout << 7 << endl; }
    else {}
    
    // more than 4
    for(;;) {
        if(N-3>=2) {
            N = N-3;
            cout << 7;
        }
        else if(N-2>=0) {
            N = N-2;
            cout << 1;
        }
        else { break; }
    }
    cout << endl;

    return 0;
}