Submission #345793

#	Time	Username	Problem	Language	Result	Execution time	Memory
345793		Kevin_Zhang_TW	Parrots (IOI11_parrots)	C++17	95 / 100	14 ms	1624 KiB

encoder

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

#ifndef MINC
#define MINC

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a ? (a = b, true) : false; }
template<class T> bool chmax(T &a, T b) { return a < b ? (a = b, true) : false; }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T L, T R) { while (L != R) cerr << *L << " \n"[next(L) == R], ++L; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

#endif

// send(int b)
void encode(int N, int M[]) {
	static const int MAX_N = 256, F = 14;
	static int cnt[MAX_N], sd[MAX_N];
	
	for (int i = 0;i < N;++i)
		++cnt[M[i]];

	for (int i = 0;i < MAX_N;++i)
		sd[i] = 4 * cnt[i];

	for (int i = 1;i < MAX_N;++i) cnt[i] += cnt[i-1];

	int b = 0;
	for (int i = 0;i < N;++i) {
		int V = --cnt[ M[i] ];

		if (i < F)
			for (int j = 0;j < 6;++j)
				sd[b++] += (V >> j & 1);
		else
			for (int j = 0;j < 6;j += 2)
				sd[b++] += (V >> j & 0b11);

	}

	for (int i = 0;i < MAX_N;++i)
		for (int j = 0;j < sd[i];++j) send(i);


	memset(cnt, 0, sizeof(cnt));
	memset(sd, 0, sizeof(sd));
}

decoder

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

#ifndef MINC
#define MINC

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a ? (a = b, true) : false; }
template<class T> bool chmax(T &a, T b) { return a < b ? (a = b, true) : false; }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T L, T R) { while (L != R) cerr << *L << " \n"[next(L) == R], ++L; }
#else
#define DE(...) 0
#define debug(...) 0
#endif


#endif
// output(int b)
void decode(int N, int L, int X[]) {
	static const int MAX_N = 256, F = 14;
	static int cnt[MAX_N];

	vector<int> val;

	for (int i = 0;i < L;++i)
		++cnt[X[i]];

	for (int i = 0;i < MAX_N;++i) {
		while (cnt[i] >= 4)
			cnt[i] -= 4, val.pb(i);
	}
	assert(val.size() == N);

	int b = 0;
	for (int i = 0;i < N;++i) {
		int res = 0;
		if (i < F) 
			for (int j = 0;j < 6;++j)
				res += cnt[b++] << j;
		else
			for (int j = 0;j < 6;j += 2)
				res += cnt[b++] << j;
		output(val[res]);
   	}

	memset(cnt, 0, sizeof(cnt));
}

Compilation message (stderr)

In file included from /usr/include/c++/9/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
                 from decoder.cpp:7:
decoder.cpp: In function 'void decode(int, int, int*)':
decoder.cpp:40:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |  assert(val.size() == N);
      |         ~~~~~~~~~~~^~~~

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 29 / 29
• Subtask 5: 14 / 19