Submission #26900

#	Time	Username	Problem	Language	Result	Execution time	Memory
26900		sgc109	Parrots (IOI11_parrots)	C++11	52 / 100	6 ms	2176 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"

void encode(int N, int M[])
{
    for(int i = 0 ; i < N; i++){
        for(int j = 0 ; j < 4; j++){
            int data = (M[i] & (3<<(2*j))) >> (2*j);
            int bit = 0;
            bit |= (i<<4);
            bit |= (j<<2);
            bit |= data;
            send(bit);
        }
    }
}

decoder

#include "decoder.h"
#include "decoderlib.h"

int M[16];
int found[16];
void decode(int N, int L, int X[])
{
    for(int i = 0 ; i < 16; i++) found[i] = 0, M[i] = 0;
  int i, b;
  for(i=0; i<L; i++) {
      int data = X[i] & 3;
      X[i] >>= 2;
      int piece = X[i] & 3;
      X[i] >>= 2;
      int order = X[i] & 15;
      M[order] |= (data << (2*piece));
      found[order] = 1;
  }
  for(int i = 0 ; i < 16 && found[i]; i++){
      output(M[i]);
  }
}

Compilation message (stderr)

decoder.cpp: In function 'void decode(int, int, int*)':
decoder.cpp:9:10: warning: unused variable 'b' [-Wunused-variable]
   int i, b;
          ^

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 0 / 29
• Subtask 5: 0 / 19