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