Submission #643104

#	Time	Username	Problem	Language	Result	Execution time	Memory
643104		TimDee	Password (RMI18_password)	C++17	Compilation error	0 ms	0 KiB

password

string guess(int n, int c) {
  int last=0;
  string s;
  while (last<n) {
    int l=0, r=c-1;
    while (l<r) {
      int mid=(l+r)>>1;
      string t=s;
      for (char i='a'; i<='a'+mid; ++i) t.push_back(i);
      int x=query(t);
      if (x>last) r=mid;
      else l=mid+1;
    }
    s+=('a'+r);
    last=s.length();
  }
  return s;
}

Compilation message (stderr)

password.cpp:1:1: error: 'string' does not name a type
    1 | string guess(int n, int c) {
      | ^~~~~~