#include <bits/stdc++.h>
using namespace std;
int main() {
  int z, o, c;
  cin >> z >> o >> c;
  int cc = c;
  c /= 2;
  z -= c;
  o -= c;
  if (z >= o) {
    while (c--) cout << "01";
    if (cc % 2 == 0) {
      while (o--) cout << "1";
      while (z--) cout << "0";
    } else {
      while (z--) cout << "0";
      while (o--) cout << "1";
    }
  } else {
    while (c--) cout << "10";
    if (cc % 2 == 0) {
      while (z--) cout << "0";
      while (o--) cout << "1";
    } else {
      while (o--) cout << "1";
      while (z--) cout << "0";
    }
  }
}
