Submission #17118

#	Time	Username	Problem	Language	Result	Execution time	Memory
17118		erdemkiraz	Parrots (IOI11_parrots)	C++98	0 / 100	4 ms	1376 KiB

encoder

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

#include <bits/stdc++.h>

using namespace std;

#define type(x) __typeof((x).begin())
#define foreach(it, x) for(type(x) it = (x).begin(); it != (x).end(); it++)
typedef long long ll;
typedef pair < int, int > ii;

const int inf = 1e9 + 333;
const ll linf = 1e18 + inf;

const int N = 100 + 5;

vector < int > v1, v2;

void encode(int n, int a[]) {
	for(int i = 0; i < n; i += 2) {
		for(int p = 0; p < 8; p++) {
			int x = ((a[i] >> p) & 1) * 2 + (i + 1 < n ? ((a[i + 1] >> p) & 1) : 0);
			for(int j = 0; j < x; j++)
				v1.push_back(i / 2 * 8 + p);
			for(int j = 0; j < 3 - x; j++)
				v2.push_back(i / 2 * 8 + p);
		}
	}
	if(0 and v1.size() > v2.size()) {
		v1.swap(v2);
		v1.push_back(255);
		v1.push_back(255);
		v1.push_back(255);
		v1.push_back(255);
	}
	foreach(it, v1) {
		int x = *it;
		send(x);
	}
}

decoder

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

#include <bits/stdc++.h>

using namespace std;

#define type(x) __typeof((x).begin())
#define foreach(it, x) for(type(x) it = (x).begin(); it != (x).end(); it++)
typedef long long ll;
typedef pair < int, int > ii;

const int inf = 1e9 + 333;
const ll linf = 1e18 + inf;

const int N = 100 + 5;

int cnt[500];

static int pw[6];
int ans[N];

void decode(int n, int m, int a[]) {
	for(int i = 0; i < m; i++)
		cnt[a[i]]++;
	if(cnt[255] >= 4) {
		cnt[255] -= 4;
		for(int i = 0; i < 256; i++)
			cnt[i] = 3 - cnt[i];
		int sz = 0;
		for(int i = 0; i < 256; i++)
			while(cnt[i]) {
				a[sz++] = i;
				cnt[i]--;
			}
	}
	for(int i= 0; i < 256; i++) {
		int x = i / 8 * 2;
		int k = i % 8;
		if(cnt[i] & 2)
			ans[x] += 1 << k;
		if(cnt[i] & 1)
			ans[x + 1] += 1 << k;
	}
	for(int i = 0; i < n; i++) {
		//printf("%d ", ans[i]);
		output(ans[i]);
	}
	puts("");
}

Compilation message (stderr)

decoder.cpp:20:12: warning: 'pw' defined but not used [-Wunused-variable]
 static int pw[6];
            ^~

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