1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
#include <iostream>
#include <cmath>
#include <vector>

using namespace std;

int main() {
    std::ios::sync_with_stdio(false);

    int n;
    cin >> n;

    string message;
    cin >> message;

    if (message.size() % 8 != 0) {
        cout << "NIE";
        return 0;
    }

    int zeroesCount = 0;
    int onesCount = 0;

    for (int i = 0; i < message.size(); i++) {
        if (message[i] == '0') {
            zeroesCount++;
        } else {
            onesCount++;
        }
    }

    int diff = onesCount - zeroesCount;

    if (abs(diff) % 2 == 1 || diff < -1 * (int)message.size() / 4 || diff > (int)message.size() / 2 ) {
        cout << "NIE";
        return 0;
    }

    vector<char> possibleOriginalMessage(message.size() / 8);
    int i = 0;

    while (diff > 2) {
        possibleOriginalMessage[i] = 'o';
        diff -= 4;
        i++;
    }

    if (diff == 2) {
        possibleOriginalMessage[i] = 'g';
        diff -= 2;
        i++;
    }

    while (diff < 0) {
        possibleOriginalMessage[i] = 'a';
        diff += 2;
        i++;
    }

    while (i < possibleOriginalMessage.size()) {
        possibleOriginalMessage[i] = 'c';
        i++;
    }

    string possibleOriginalMessageAsString(possibleOriginalMessage.begin(), possibleOriginalMessage.end());

    cout << possibleOriginalMessageAsString;
}