#include <bits/stdc++.h>
using namespace std;
int main() {
  int t, n, i;
  cin >> t;
  while (t--) {
    cin >> n;
    if (n % 2 == 0) {
      for (i = 0; i < n / 2; i++) {
        cout << "1";
      }
      cout << endl;
    } else {
      cout << "7";
      n -= 3;
      for (i = 0; i < n / 2; i++) {
        cout << "1";
      }
      cout << endl;
    }
  }
}
