#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long t;
  cin >> t;
  while (t--) {
    long long n;
    cin >> n;
    if (n & 1) {
      cout << "7";
      for (long long i = 0; i < (n - 3) / 2; i++) cout << "1";
    } else {
      for (long long i = 0; i < n / 2; i++) cout << "1";
    }
    cout << "\n";
  }
}
