Submission #771315

#	Time	Username	Problem	Language	Result	Execution time	Memory
771315		iulia13	Parrots (IOI11_parrots)	C++14	81 / 100	5 ms	1228 KiB

encoder

#include <bits/stdc++.h>
#include "encoder.h"
#include "encoderlib.h"
using namespace std;
const int N = 513;
void encode(int n, int a[])
{
    int cnt = 0, i = 0, ok = 0, tot = 3 * 128;
    while (cnt <= 248 && i < n)
    {
        int nr = 128;
        while(nr)
        {
            if (a[i] & nr)
                ok++;
            nr /= 2;
            cnt++;
        }
        i++;
    }
    while (cnt <= 504 && i < n)
    {
        int nr = 128;
        while (nr)
        {
            if (a[i] & nr)
            {
                ok += 2;
                //send(cnt - 256);
                //send(cnt - 256);
            }
            nr /= 2;
            cnt++;
        }
        i++;
    }
    if (ok <= tot)
        ok = 1;
    else
        ok = 0;
 
    cnt = i = 0;
    while (cnt <= 248 && i < n)
    {
        int nr = 128;
        while(nr)
        {
            if ((a[i] & nr) == nr * ok)
                send(cnt);
            nr /= 2;
            cnt++;
        }
        i++;
    }
    while (cnt <= 504 && i < n)
    {
        int nr = 128;
        while (nr)
        {
            if ((a[i] & nr) == nr * ok)
            {
                send(cnt - 256);
                send(cnt - 256);
            }
            nr /= 2;
            cnt++;
        }
        i++;
    }
    if (!ok)
    {
        send(0);
        send(0);
        send(0);
        send(0);
    }
}

decoder

#include <bits/stdc++.h>
#include "decoder.h"
#include "decoderlib.h"
 
using namespace std;
const int N = 513;
int vf[N];
int ans[N];
int bits[N];
void decode(int n, int l, int a[])
{
    for (int i = 0; i < 256; i++)
        vf[i] = 0;
    for (int i = 0; i < l; i++)
    {
        vf[a[i]]++;
    }
    for (int i = 0; i < N; i++)
        bits[i] = 0;
    if (vf[0] >= 4)
    {
        for (int i = 0; i < N; i++)
            bits[i] = 1;
    }
 
    for (int i = 0; i < 256; i++)
    {
        if (vf[i] & 1)
            bits[i] |= 1;
        if (vf[i] & 2)
            bits[i] |= 1;
    }
    int j = 0;
    for (int i = 0; i < n; i++)
    {
        int nr = 128;
        ans[i] = 0;
        while (nr)
        {
            ans[i] += bits[j] * nr;
            nr /= 2;
            j++;
        }
        output(ans[i]);
    }
}

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