#include "message.h"
#include <bits/stdc++.h>
using namespace std;
using vb = vector<bool>;
using vvb = vector<vb>;
void send_message(vb M, vb C) {
vector<int> bits; for (int i = 0; i < 31; i++) if (!C[i]) bits.push_back(i);
int cidx = 0;
vvb packets(66, vb(31, true));
for (int i = 0; i < 16; i++) {
int nxt = (bits[i == 15 ? 0 : i + 1] - bits[i] + 31) % 31;
for (int j = 0; j < 66; j++) {
if (j + 1 < nxt) packets[j][bits[i]] = false;
else if (j + 1 == nxt) packets[j][bits[i]] = true;
else {
if (cidx == M.size()) packets[j][bits[i]] = true;
else if (cidx > M.size()) packets[j][bits[i]] = false;
else packets[j][bits[i]] = M[cidx];
cidx++;
}
}
}
for (auto &el : packets) send_packet(el);
}
vb receive_message(vvb R) {
vb ans;
vector<int> nxt(31, -1);
vvb info(31, vb());
for (int i = 0; i < 31; i++) {
for (int j = 0; j < 66; j++) {
if (R[j][i] == 1 && nxt[i] == -1) {
nxt[i] = (i + j + 1) % 31;
} else if (nxt[i] != -1) {
info[i].push_back(R[j][i]);
}
}
}
vector<int> bits;
for (int i = 0; i < 31; i++) {
int cur = i; vector<int> trial;
while (trial.size() < 16 && !count(trial.begin(), trial.end(), cur) && cur < 31) {
trial.push_back(cur);
cur = nxt[cur];
}
if (trial.size() == 16 && nxt[trial.back()] == i) {
bits = trial; break;
}
}
for (int i = 0; i < 16; i++) {
// cout << bits[i] << " ";
for (int j = 0; j < info[bits[i]].size(); j++) ans.push_back(info[bits[i]][j]);
}
// cout << "\n";
while (!ans.back()) ans.pop_back();
ans.pop_back();
return ans;
}
