Submission #596008

#	Time	Username	Problem	Language	Result	Execution time	Memory
596008		snasibov05	Parrots (IOI11_parrots)	C++14	98 / 100	8 ms	1220 KiB

encoder

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

void encode(int n, int m[]){
    const int nn = 32;
    int mx = 8;

    int cntz = 0, cnto = 0;
    for (int i = 0; i < n; ++i){
        for (int j = 0; j < mx; ++j){
            if ((1 << j) & m[i]) cnto++;
            else cntz++;
        }
    }

    if (cnto <= cntz) {
        for (int i = 0; i < n; ++i){
            for (int j = 0; j < mx; ++j){
                if (1 << j & m[i]) {
                    if (i < nn) send(j * nn + i);
                    else {
                        send(j * nn + (i - nn));
                        send(j * nn + (i - nn));
                    }
                }
            }
        }
    } else{
        send(0); send(0); send(0); send(0);
        for (int i = 0; i < n; ++i){
            for (int j = 0; j < mx; ++j){
                if (!(1 << j & m[i])) {
                    if (i < nn) send(j * nn + i);
                    else {
                        send(j * nn + (i - nn));
                        send(j * nn + (i - nn));
                    }
                }
            }
        }
    }


}

decoder

#include "decoder.h"
#include "decoderlib.h"
#include "bits/stdc++.h"

using namespace std;

void decode(int n, int l, int x[]){
    const int nn = 32;
    map<int, int> cnt;
    for (int i = 0; i < l; ++i) cnt[x[i]]++;

    bool flag = cnt[0] > 3;
    if (flag) cnt[0] -= 4;

    vector<int> v(n);
    for (auto [cur, c] : cnt){
        if (c == 1 || c == 3) v[cur % nn] += (1 << (cur / nn));
        if (c == 2 || c == 3) v[cur % nn + nn] += (1 << (cur / nn));
    }

    if (flag) {
        for (int i = 0; i < n; ++i){
            v[i] = 255 - v[i];
        }
    }

    for (int i = 0; i < n; ++i) output(v[i]);
}

Compilation message (stderr)

decoder.cpp: In function 'void decode(int, int, int*)':
decoder.cpp:16:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   16 |     for (auto [cur, c] : cnt){
      |               ^

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