#include<bits/stdc++.h>
using namespace std;
void send_message(std::vector<bool> M, std::vector<bool> C)
{
	mt19937 rnd(353442899);
	vector<bool>vec[66];
	for(int i=1;i<=64;i++)
	{
		vec[i].resize(31);
	}
	__int128 cnt=0;
	for(int j=0;j<31;j++)
	{
		if(C[j]==1)
		cnt+=rnd()/j;
		for(int i=1;i<=64;i++)
		{
			if(C[j]==1)
			vec[i][j]=0;
			else
			{
				long long us=rnd();
				vec[i][j]=(cnt*37/us+us)%2;
			}
		}
	}
	for(int i=1;i<=64;i++)
	{
		std::vector<bool> send_packet(vec[i]);
	}
	cnt=0;
	for(int i=1;i<=2;i++)
	{
		for(int j=0;j<31;j++)
		{
			if(C[j]==1)
			vec[i][j]=0;
			else
			{
				if(cnt<=30)
				vec[i][j]=M[cnt];
				cnt++;
			}
		}		
		std::vector<bool> send_packet(vec[i]);
	}
	return;	
}
std::vector<bool> receive_message(std::vector<std::vector<bool>> R)
{
	mt19937 rnd(353442899);
	vector<long long>vec;
	for(int i=0;i<=10000;i++)
	{
		vec.push_back(rnd());
	}
	bool vis[31];
	memset(vis,0,sizeof(vis));
	__int128 cnt=0;
	int nw=0;
	for(int i=0;i<31;i++)
	{
		bool f=0;
		for(int j=0;j<64;j++)
		{
			if((cnt*37/vec[nw+j]+vec[nw+j])%2!=R[j][i])
			{
				f=1;
				break;
			}
		}
		if(f==1)
		{
			cnt+=vec[nw++]/i;
		}
		else
		{
			vis[i]=1;
		}
		nw+=64;
	}	
	vector<bool>ans(31);
	cnt=0;
	for(int i=64;i<=65;i++)
	{
		for(int j=0;j<31;j++)
		{
			if(vis[j]==0)
			continue;
			if(cnt<=30)
			{
				ans[j]=R[i][j];
			}
			cnt++;
		}
	}
	return ans;
}

stub.cpp: In function ‘int {anonymous}::sz(const C&)’:
stub.cpp:27:52: error: ‘size’ is not a member of ‘std’; did you mean ‘size_t’?
   27 | template<class C> int sz(const C& c) { return std::size(c); }
      |                                                    ^~~~
      |                                                    size_t
stub.cpp: In function ‘void {anonymous}::write_int_array(const int*, int)’:
stub.cpp:70:13: warning: init-statement in selection statements only available with ‘-std=c++17’ or ‘-std=gnu++17’
   70 |         if (int ret = fwrite(arr, sizeof(int), len, fout); len != ret) {
      |             ^~~
stub.cpp: In function ‘void {anonymous}::read_int_array(int*, int)’:
stub.cpp:105:13: warning: init-statement in selection statements only available with ‘-std=c++17’ or ‘-std=gnu++17’
  105 |         if (int ret = fread(arr, sizeof(int), len, fin); len != ret) {
      |             ^~~