Submission #260225

#	Time	Username	Problem	Language	Result	Execution time	Memory
260225		islingr	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++17	0 / 100	2 ms	384 KiB

encoder

int encode(int n, int x, int y) {
  int h[924];
  for (int S = 0, c = 0; c != 924; ++S)
    if (__builtin_popcount(S) == 6)
      h[c++] = S;
  x = h[x]; y = h[x];
  for (int i = 0; i < 12; ++i)
    for (int j = 0; j < 12; ++j)
      if ((x & 1 << i) && (~y & 1 << j))
        return i + 1;
}

decoder

int decode(int n, int q, int k) {
  int h[924];
  for (int S = 0, c = 0; c != 924; ++S)
    if (__builtin_popcount(S) == 6)
      h[c++] = S;
	q = h[q];
	return q >> --k & 1;
}

Compilation message (stderr)

encoder.cpp: In function 'int encode(int, int, int)':
encoder.cpp:11:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 0 / 100