Submission #246386

#	Time	Username	Problem	Language	Result	Execution time	Memory
246386		luisoncpp	Parrots (IOI11_parrots)	C++17	24 / 100	18 ms	1792 KiB

encoder

#include <algorithm>
#include <iostream>
#include <vector>
#include <cstdint>
#include <cstdlib>
#include <cassert>
#include <queue>
#include <unordered_map>
#define PARROTS
#ifndef PARROTS_MAIN
#include "encoder.h"
#include "encoderlib.h"
#endif

template<typename T>
using Vec = std::vector<T>;

Vec<int> SplitInto2Bit(int N, int* message) {
	Vec<int> ret;
	for (int i = 0; i < N; ++i) {
		for (int k = 0; k < 4; ++k) {
			int a = (message[i]>>(2*k));
			ret.push_back(a&3);
		}
	}
	return ret;
}

void encode(int N, int* message_8) {
	auto message = SplitInto2Bit(N, message_8);
	for (int i = 0; i < message.size(); ++i) {
		int num = message[i];
		assert(num>=0 && num<4);
		int times = num;
		while (times--) {
			send(i);
		}
	}
}

decoder

#include <algorithm>
#include <iostream>
#include <vector>
#include <cstdint>
#include <cstdlib>
#include <cassert>
#include <queue>
#include <unordered_map>
#ifndef PARROTS_MAIN
#include "decoder.h"
#include "decoderlib.h"
#endif
#ifndef PARROTS
template<typename T>
using Vec = std::vector<T>;
#endif

void decode(int N, int L, int* X) {
	Vec<int> decoded_2_bit(4*N);
	std::unordered_map<int, int> Count;
	for (int i = 0; i < L; ++i) {
		++decoded_2_bit.at(X[i]);
	}
	for (int i = 0; i < 4*N; i += 4) {
		int num = 0;
		for (int k = 0; k < 4; ++k) {
			num |= (decoded_2_bit.at(i + k)<<(2*k));
		}
		output(num);
	}
}

Compilation message (stderr)

encoder.cpp: In function 'void encode(int, int*)':
encoder.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < message.size(); ++i) {
                  ~~^~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 18
• Subtask 4: 0 / 29
• Subtask 5: 7 / 19