#include <bits/stdc++.h>
using namespace std;
long long MOD = 1e9 + 7, MAX = 1e18;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  ;
  long long t;
  cin >> t;
  while (t--) {
    long long n0, n1, n2, i;
    cin >> n0 >> n1 >> n2;
    string second = "";
    if (n1) {
      if (n1 % 2) {
        for (i = 0; i <= n1; i++) {
          if (i % 2)
            second.push_back('0');
          else
            second.push_back('1');
        }
        while (n2--) cout << 1;
        cout << second;
        while (n0--) cout << 0;
        cout << "\n";
      } else {
        for (i = 1; i <= n1; i++) {
          if (i % 2)
            second.push_back('0');
          else
            second.push_back('1');
        }
        while (n2--) cout << 1;
        cout << 1;
        while (n0--) cout << 0;
        cout << second << "\n";
      }
    } else {
      if (n2)
        for (i = 0; i <= n2; i++) cout << 1;
      if (n0)
        for (i = 0; i <= n0; i++) cout << 0;
      cout << "\n";
    }
  }
  return 0;
}
