Submission #1123674

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123674		math_rabbit_1028	Message (IOI24_message)	C++20	Compilation error	0 ms	0 KiB

message

#include "message.h"
using namespace std;

vector<bool> add_blank(vector<bool> A, vector<bool> C) {
	vector<bool> ret;
	reverse(A.begin(), A.end());
	for (int i = 0; i < 31; i++) {
		if (C[i]) ret.push_back(0);
		else {
			ret.push_back(A.back());
			A.pop_back();
		}
	}
	assert(A.empty());
	return ret;
}

void send_message(vector<bool> M, vector<bool> C) {
	int S = (int)(M.size());
	vector<bool> T(31, 1), F(31, 0);
	for (int i = 0; i < 30; i++) {
		if (C[i]) send_packet(T);
		else send_packet(F);
	}
	
	for (int i = 0; i < S; i += 16) {
		vector<bool> A(16, 0);
		for (int j = 0; j < 16; j++) {
			A[j] = (i+j < S) ? M[i+j] : 0;
		}
		send_packet(add_blank(A, C));
	}
	
	vector<bool> A(16, 0);
	for (int j = 0; j < 16; j++) {
		if (j < S%16) A[j] = 1;
		else A[j] = 0;
	}
	send_packet(add_blank(A, C));
}

vector<bool> rem_blank(vector<bool> A, vector<bool> C) {
	vector<bool> ret;
	for (int i = 0; i < 31; i++) {
		if (C[i]) continue;
		else {
			ret.push_back(A[i]);
		}
	}
	assert(ret.size() == 16);
	return ret;
}

vector<bool> receive_message(vector<vector<bool>> R) {
	vector<bool> C(31, 0);
  	for (int i = 0; i < 30; i++) {
		vector<bool> V = R[i];
		int a = 0, b = 0; // 0 - 1
		for (int i = 0; i < 31; i++) {
			if (V[i]) b++;
			else a++;
		}
		if (a > b) C[i] = 0;
		else C[i] = 1;
	}
	int a = 0, b = 0; // 0 - 1
	for (int i = 0; i < 30; i++) {
		if (C[i]) b++;
		else a++;
	}
	if (a < 16) C[30] = 0;
	else C[30] = 1;

	vector<bool> ret;
	for (int i = 30; i < R.size()-1; i++) {
		vector<bool> V = rem_blank(R[i], C);
		for (int j = 0; j < 16; j++) ret.push_back(V[j]);
	}
	vector<bool> V = rem_blank(R.back(), C);
	for (int i = 0; i < 16; i++) {
		if (!V[i]) ret.pop_back();
	}
	return ret;
}

Compilation message (stderr)

message.cpp: In function 'std::vector<bool> add_blank(std::vector<bool>, std::vector<bool>)':
message.cpp:14:9: error: 'assert' was not declared in this scope
   14 |         assert(A.empty());
      |         ^~~~~~
message.cpp:2:1: note: 'assert' is defined in header '<cassert>'; did you forget to '#include <cassert>'?
    1 | #include "message.h"
  +++ |+#include <cassert>
    2 | using namespace std;
message.cpp: In function 'std::vector<bool> rem_blank(std::vector<bool>, std::vector<bool>)':
message.cpp:50:9: error: 'assert' was not declared in this scope
   50 |         assert(ret.size() == 16);
      |         ^~~~~~
message.cpp:50:9: note: 'assert' is defined in header '<cassert>'; did you forget to '#include <cassert>'?