contract Register {
  mapping (string => string) names;
  
  function register(string name, string value) returns boolean {
    if (names[name] == 0) {
      names[name] = value;
      return true;
    }
    return false;
  }

  function lookup(string name) returns string {
    return names[name];
  }
}

contract BadRPS {
  uint nPlayers;
  mapping (address => uint) moves;

  function move(uint move) returns (boolean success) {
    if (nPlayers < 2 && msg.value >= 10) {
      nPlayers++;
      moves[msg.sender] = move;
      return true;
    }
    return false;
  }
}

contract RPS {
  uint nPlayers;
  mapping (address => uint) moves;

  function move(uint move) returns (boolean success) {
    if (nPlayers < 2 && msg.value >= 10) {
      nPlayers++;
      moves[msg.sender] = move;
      return true;
    }
    throw;
  }
}