Submission #67291

#	Time	Username	Problem	Language	Result	Execution time	Memory
67291		RezwanArefin01	Parrots (IOI11_parrots)	C++17	98 / 100	15 ms	2440 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"
#include <bits/stdc++.h>
using namespace std;
 
void encode(int N, int M[]) {
    vector<pair<int, int> > v; 
    int one = 0, zero = 0;
    for(int i = 0; i < 4 * N; i++) {
        int c = (M[i / 4] >> ((3 - (i % 4)) * 2)) & 3; 
        v.emplace_back(i, c); 
        one += c; 
        zero += 3 - c; 
    }
    if(zero < one) { 
        for(auto &x : v) 
            x.second = 3 - x.second; 
        send(255); send(255); send(255); send(255); 
    }
    for(auto &x : v) 
        while(x.second--) send(x.first); 
}

decoder

#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>
using namespace std;
 
void decode(int N, int L, int X[]) {
    int a[256];
    memset(a, 0, sizeof a);
    int zero = 0;
    for(int i = 0; i < L; i++) 
        a[X[i]]++; 
    if(a[255] >= 4) {
        a[255] -= 4, 
        zero = 1; 
    }
    for(int i = 0; i < 4 * N && zero; i++) 
        a[i] = 3 - a[i]; 
    for(int i = 0; i < N; i++) {
        int num = 0;
        for(int j = i * 4; j < (i + 1) * 4; j++) 
            num = num * 4 + a[j];
        output(num);
    }    
}

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