Submission #754194

#	Time	Username	Problem	Language	Result	Execution time	Memory
754194		lukameladze	Parrots (IOI11_parrots)	C++14	88 / 100	10 ms	1520 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"
# include <bits/stdc++.h>
using namespace std;
# define pb push_back
void encode(int N, int M[]) {
    if (N <= 32) {
        int id = 0;
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < 8; j++) {
                if ((1<<j)&M[i]) {
                    //cout<<"send "<<i<<" "<<j<<" "<<id<<"\n";
                    send(id);
                }
                id++;
            }
        }
    } else {
        vector <int> v;
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < 8; j++) {
                if ((1<<j)&M[i]) {
                    v.pb(1);
                } else v.pb(0);
            }
        }
        for (int i = 0; i < v.size(); i+=2) {
            if (v[i] == 0 && v[i + 1] == 0) {
                continue;
            }
            if (v[i] == 0 && v[i + 1] == 1) {
                send(i / 2); continue;
            }
            if (v[i] == 1 && v[i + 1] == 0) {
                send(i / 2); send(i / 2); continue;
            }
            if (v[i] == 1 && v[i + 1] == 1) {
                send(i / 2); send(i / 2); send(i / 2); continue;
            }
        }
    }
}

decoder

#include "decoder.h"
#include "decoderlib.h"
# include <bits/stdc++.h>
using namespace std;
# define pb push_back
const int MX = 1e4 + 5;
void decode(int N, int L, int X[]) {
    vector <int> ans, x, cnt;
    ans = vector <int>(MX, 0);
    x = vector <int> (MX, 0);
    cnt = vector <int> (MX, 0);
    for (int i = 0; i < L; i++) x[i] = X[i];
    //cout<<"received ";
    //for (int i = 0; i < L; i++) cout<<x[i]<<" ";
    //cout<<"\n";
    if (N <= 32) {
        for (int i = 0; i < L; i++) {
            int id = x[i];
            ans[id / 8] += (1<<(id % 8));
        }
        for (int i = 0; i < N; i++) {
            output(ans[i]);
        }
        return ;
    }
    for (int i = 0; i < L; i++) {
        cnt[x[i]]++;
    }
    vector <int> v;
    for (int i = 0; i < 4 * N; i++) {
        if (cnt[i] == 0) v.pb(0), v.pb(0);
        else if (cnt[i] == 1) v.pb(0), v.pb(1);
        else if (cnt[i] == 2) v.pb(1), v.pb(0);
        else if (cnt[i] == 3) v.pb(1), v.pb(1);
    }
    int id = 0;
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < 8; j++) {
            if (v[id] == 1) ans[i] += (1<<j);
            id++;
        }
    }
    for (int i = 0; i < N; i++) {
        output(ans[i]);
    }
}

Compilation message (stderr)

encoder.cpp: In function 'void encode(int, int*)':
encoder.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         for (int i = 0; i < v.size(); i+=2) {
      |                         ~~^~~~~~~~~~

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