Submission #503904

#	Time	Username	Problem	Language	Result	Execution time	Memory
503904		t12345	Parrots (IOI11_parrots)	C++14	17 / 100	8 ms	1224 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"
#include <vector>
using namespace std;

void encode(int N, int M[]) {
	int i, j, t;
	vector<int> c0, c1;
	for(i=0; i<N; i++) {
		t = M[i];
		for(j=0; j<(t>>6&3); j++) c0.push_back(i*4);
		for(j=0; j<(t>>4&3); j++) c0.push_back(i*4+1);
		for(j=0; j<(t>>2&3); j++) c0.push_back(i*4+2);
		for(j=0; j<(t>>0&3); j++) c0.push_back(i*4+3);
		t = 3 - M[i];
		for(j=0; j<(t>>6&3); j++) c1.push_back(i*4);
		for(j=0; j<(t>>4&3); j++) c1.push_back(i*4+1);
		for(j=0; j<(t>>2&3); j++) c1.push_back(i*4+2);
		for(j=0; j<(t>>0&3); j++) c1.push_back(i*4+3);
	}
	if(c0.size() < c1.size()) {
		for(i=0; i<c0.size(); i++) send(c0[i]);
	} else {
		for(i=0; i<c1.size(); i++) send(c1[i]);
		for(i=0; i<4; i++) send(0);
	}
}

decoder

#include "decoder.h"
#include "decoderlib.h"
void decode(int N, int L, int X[]) {
	int i, c[260]={};
	for(i=0; i<L; i++) c[X[i]]++;
	if(c[0]<4) {
		for(i=0; i<N; i++) {
			output(c[i*4]*64 + c[i*4+1]*16 + c[i*4+2]*4 + c[i*4+3]);
		}
	} else {
		c[0] -= 4;
		for(i=0; i<N; i++) {
			output((3-c[i*4])*64 + (3-c[i*4+1])*16 + (3-c[i*4+2])*4 + (3-c[i*4+3]));
		}
	}
}

Compilation message (stderr)

encoder.cpp: In function 'void encode(int, int*)':
encoder.cpp:22:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   for(i=0; i<c0.size(); i++) send(c0[i]);
      |            ~^~~~~~~~~~
encoder.cpp:24:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   for(i=0; i<c1.size(); i++) send(c1[i]);
      |            ~^~~~~~~~~~

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