#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define REP(i, n)           for(int(i)=0;(i)<(n);++(i))
#define REPEAT(i, k, n)     for(int(i)=(k);(i)<((k)+(n));++(i))

int main(){
    int N;
    cin >> N;

    if(N%2==1){
        cout << 7; N-=3;
    }
    REP(i,N/2){
        cout << 1;
    }
    cout << endl;

    return 0;
}