Submission #1074122

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074122		Elias	Mechanical Doll (IOI18_doll)	C++17	39 / 100	64 ms	15344 KiB

doll

#include <bits/stdc++.h>

using namespace std;

#ifndef _DEBUG
#include "doll.h"
#else
void answer(std::vector<int> C, std::vector<int> X, std::vector<int> Y);
#endif

vector<int> x;
vector<int> y;
vector<int> a;

int max_levels = 0;

int construct_recursive(int i, int level, int index)
{
	while (x.size() <= index)
	{
		x.push_back(0);
		y.push_back(0);
	}
	if (level < max_levels)
	{
		x[index] = -construct_recursive(i, level + 1, index * 2 + 1) - 1;
		y[index] = -construct_recursive(i + (1 << level), level + 1, index * 2 + 2) - 1;
	}
	else
	{
		if (i >= a.size())
		{
			x[index] = -1;
		}
		else
		{
			x[index] = a[i];
		}

		if (i + (1 << level) >= a.size())
		{
			if (i == (1 << level) - 1)
			{
				y[index] = 0;
			}
			else
			{
				y[index] = -1;
			}
		}
		else
		{
			y[index] = a[i + (1 << level)];
		}
	}
	return index;
}

void create_circuit(int M, std::vector<int> A)
{
	vector<int> c(M + 1, -1);

	unordered_map<int, int> counts;

	for (int x : A) {
		counts[x]++;
	}

	vector<int> keep(A.size(), 1);

	for (int i = 0; i < A.size() - 1; i++) {
		if (counts[A[i]] == 1) {
			keep[i + 1] = 0;
			c[A[i]] = A[i + 1];
		}
	}

	for (int i = 0; i < A.size(); i++) {
		if (keep[i]) {
			a.push_back(A[i]);
		}
	}

	int n = a.size();

	int number_of_options = 2;
	while (number_of_options < n + 1) {
		max_levels++;
		number_of_options *= 2;
	}

	c[0] = -construct_recursive(0, 0, 0) - 1;

	answer(c, x, y);
}

#ifdef _DEBUG

namespace
{

	constexpr int P_MAX = 20000000;
	constexpr int S_MAX = 400000;

	int M, N;
	std::vector<int> A;

	bool answered;
	int S;
	std::vector<int> IC, IX, IY;

	int read_int()
	{
		int x;
		if (scanf("%d", &x) != 1)
		{
			fprintf(stderr, "Error while reading input\n");
			exit(1);
		}
		return x;
	}

	void wrong_answer(const char *MSG)
	{
		printf("Wrong Answer: %s\n", MSG);
		exit(0);
	}

	void simulate()
	{
		if (S > S_MAX)
		{
			char str[50];
			sprintf(str, "over %d switches", S_MAX);
			wrong_answer(str);
		}
		for (int i = 0; i <= M; ++i)
		{
			if (!(-S <= IC[i] && IC[i] <= M))
			{
				wrong_answer("wrong serial number");
			}
		}
		for (int j = 1; j <= S; ++j)
		{
			if (!(-S <= IX[j - 1] && IX[j - 1] <= M))
			{
				wrong_answer("wrong serial number");
			}
			if (!(-S <= IY[j - 1] && IY[j - 1] <= M))
			{
				wrong_answer("wrong serial number");
			}
		}

		int P = 0;
		std::vector<bool> state(S + 1, false);
		int pos = IC[0];
		int k = 0;
		FILE *file_log = fopen("log.txt", "w");
		fprintf(file_log, "0\n");
		for (;;)
		{
			fprintf(file_log, "%d\n", pos);
			if (pos < 0)
			{
				if (++P > P_MAX)
				{
					fclose(file_log);
					char str[50];
					sprintf(str, "over %d inversions", P_MAX);
					wrong_answer(str);
				}
				state[-pos] = !state[-pos];
				pos = state[-pos] ? IX[-(1 + pos)] : IY[-(1 + pos)];
			}
			else
			{
				if (pos == 0)
				{
					break;
				}
				if (k >= N)
				{
					fclose(file_log);
					wrong_answer("wrong motion");
				}
				if (pos != A[k++])
				{
					fclose(file_log);
					wrong_answer("wrong motion");
				}
				pos = IC[pos];
			}
		}
		fclose(file_log);
		if (k != N)
		{
			wrong_answer("wrong motion");
		}
		for (int j = 1; j <= S; ++j)
		{
			if (state[j])
			{
				wrong_answer("state 'Y'");
			}
		}
		printf("Accepted: %d %d\n", S, P);
	}

} // namespace

void answer(std::vector<int> C, std::vector<int> X, std::vector<int> Y)
{
	if (answered)
	{
		wrong_answer("answered not exactly once");
	}
	answered = true;
	// check if input format is correct
	if ((int)C.size() != M + 1)
	{
		wrong_answer("wrong array length");
	}
	if (X.size() != Y.size())
	{
		wrong_answer("wrong array length");
	}
	S = X.size();
	IC = C;
	IX = X;
	IY = Y;
}

int main()
{
	M = read_int();
	N = read_int();
	A.resize(N);
	for (int k = 0; k < N; ++k)
	{
		A[k] = read_int();
	}

	answered = false;
	create_circuit(M, A);
	if (!answered)
	{
		wrong_answer("answered not exactly once");
	}
	FILE *file_out = fopen("out.txt", "w");
	fprintf(file_out, "%d\n", S);
	for (int i = 0; i <= M; ++i)
	{
		fprintf(file_out, "%d\n", IC[i]);
	}
	for (int j = 1; j <= S; ++j)
	{
		fprintf(file_out, "%d %d\n", IX[j - 1], IY[j - 1]);
	}
	fclose(file_out);
	simulate();
	return 0;
}

#endif

Compilation message (stderr)

doll.cpp: In function 'int construct_recursive(int, int, int)':
doll.cpp:19:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |  while (x.size() <= index)
      |         ~~~~~~~~~^~~~~~~~
doll.cpp:31:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |   if (i >= a.size())
      |       ~~^~~~~~~~~~~
doll.cpp:40:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |   if (i + (1 << level) >= a.size())
      |       ~~~~~~~~~~~~~~~~~^~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:71:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |  for (int i = 0; i < A.size() - 1; i++) {
      |                  ~~^~~~~~~~~~~~~~
doll.cpp:78:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |  for (int i = 0; i < A.size(); i++) {
      |                  ~~^~~~~~~~~~

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• Subtask 3: 0 / 10
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• Subtask 6: 28 / 56