oj.uz

답안 #591553

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
591553 2022-07-07T14:56:21 Z tutis Flight to the Ford (BOI22_communication) C++17
76 / 100
 4288 ms 2116 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int prob = 1;
#include "communication.h"
int dec3(int x)//4 bit x
{
	vector<int>ger;
	for (int m = 0; m < 16; m++)
	{
		bool ok = true;
		int v = m;
		while (v != 0)
		{
			if (v % 4 == 3)
				ok = false;
			v /= 2;
		}
		if (ok)
			ger.push_back(m);
	}
	int V[4] = {0, 0, 6, 9};
	for (int i = 1; i <= 3; i++)
	{
		bool ok = true;
		for (int j : ger)
			if (x == (V[i] ^ j))
				ok = false;
		if (ok)
			return i;
	}
	assert(false);
	return 0;
}
int enc3(int X)
{
	int v = 0;
	if (X == 1)
		v = 0;
	else if (X == 2)
		v = 6;
	else if (X == 3)
		v = 9;
	int val = 0;
	for (int t = 0; t < 4; t++)
	{
		val += send(v % 2) << t;
		v /= 2;
	}
	return dec3(val);
}
string S4[4] = {"1000",
                "0001",
                "1110",
                "0111"
               };
int conv4(int i)
{
	int v = 0;
	int p = 1;
	for (char c : S4[i])
	{
		if (c == '1')
			v += p;
		p *= 2;
	}
	return v;
}
bitset<4> dec4(int x)//4 bit x
{
	vector<int>ger;
	for (int m = 0; m < 16; m++)
	{
		bool ok = true;
		int v = m;
		while (v != 0)
		{
			if (v % 4 == 3)
				ok = false;
			v /= 2;
		}
		if (ok)
			ger.push_back(m);
	}
	bitset<4>ret;
	for (int i = 0; i < 4; i++)
	{
		for (int j : ger)
			if (x == (conv4(i) ^ j))
				ret[i] = true;
	}
	return ret;
}
bitset<4> enc4(int X)
{
	int v = conv4(X);
	int val = 0;
	for (int t = 0; t < 4; t++)
	{
		val += (send(v % 2) << t);
		v /= 2;
	}
	auto ret = dec4(val);
	assert(ret[X] == true);
	return ret;
}
const int bitcnt = 10;
int bitcnt1 = 10;
bitset < 1 << bitcnt > decB(int x) //4 bit x
{
	vector<int>ger;
	for (int m = 0; m < (1 << bitcnt1); m++)
	{
		bool ok = true;
		int v = m;
		while (v != 0)
		{
			if (v % 4 == 3)
				ok = false;
			v /= 2;
		}
		if (ok)
			ger.push_back(m);
	}
	bitset < 1 << bitcnt > ret;
	int s = 0;
	int i = 0;
	function<void(bool)>f = [&](bool gal)
	{
		if (i == bitcnt1)
		{
			ret[x ^ s] = true;
		}
		else
		{
			int del = 1 << i;
			i++;
			if (gal)
			{
				f(true);
				s += del;
				f(false);
				s -= del;
			}
			else
				f(true);
			i--;
		}
	};
	f(true);
	return ret;
}
bitset < 1 << bitcnt > encB(int v)
{
	int val = 0;
	int vv = v;
	for (int t = 0; t < bitcnt1; t++)
	{
		val += (send(v % 2) << t);
		v /= 2;
	}
	auto ret = decB(val);
	assert(ret[vv] == true);
	return ret;
}
void encode(int N, int X)
{
	if (N < 3)
		return;
	if (N == 3)
	{
		enc3(X);
		return;
	}
	for (int bc = 10; bc >= 6; bc--)
		if (N > (1 << bc))
		{
			while (N % (1 << bc) != 0)
				N++;
			int v = N / (1 << bc);
			int vv = (X - 1) / v;
			vv = min(vv, (1 << bc) - 1);
			bitcnt1 = bc;
			bitset < (1 << bitcnt) > gal = encB(vv);
			int s = 0;
			for (int i = 0; i < (1 << bc); i++)
			{
				if (gal[i])
					s += v;
				else if (i < vv)
					X -= v;
			}
			encode(s, X);
			return;
		}
	if (N >= 4)
	{
		while (N % 4 != 0)
			N++;
		int v = N / 4;
		int vv = (X - 1) / v;
		vv = min(vv, 3);
		bitset<4>gal = enc4(vv);
		int s = 0;
		for (int i = 0; i < 4; i++)
		{
			if (gal[i])
			{
				s += v;
			}
			else if (i < vv)
				X -= v;
		}
		encode(s, X);
		return;
	}
}
pair<int, int> decode(int N)
{
	if (N == 1)
		return {1, 1};
	if (N == 2)
		return {1, 2};
	if (N == 3)
	{
		int val = 0;
		for (int t = 0; t < 4; t++)
			val += receive() << t;
		int v = dec3(val);
		pair<int, int>ans = {1, 2};
		if (v == 1)
			ans.first = 3;
		if (v == 2)
			ans.second = 3;
		return ans;
	}
	for (int bc = 10; bc >= 6; bc--)
		if (N > (1 << bc))
		{
			int N1 = N;
			while (N % (1 << bc) != 0)
				N++;
			int re = 0;
			for (int t = 0; t < bc; t++)
				re += receive() << t;
			bitcnt1 = bc;
			bitset < (1 << bitcnt) > gal = decB(re);
			int v = N / (1 << bc);
			int s = 0;
			for (int i = 0; i < (1 << bc); i++)
				if (gal[i])
					s += v;
			pair<int, int>r = decode(s);
			int sum = 0;
			bool ger1 = false;
			bool ger2 = false;
			for (int i = 0; i < (1 << bc); i++)
			{
				if (gal[i])
				{
					if (r.first > sum && r.first <= sum + v && ger1 == false)
					{
						for (int j = 0; j < i; j++)
						{
							if (gal[j] == false)
								r.first += v;
						}
						ger1 = true;
					}
					if (r.second > sum && r.second <= sum + v && ger2 == false)
					{
						for (int j = 0; j < i; j++)
						{
							if (gal[j] == false)
								r.second += v;
						}
						ger2 = true;
					}
					sum += v;
				}
			}
			r.first = min(r.first, N1);
			r.second = min(r.second, N1);
			return r;
		}
	if (N >= 4)
	{
		int N1 = N;
		while (N % 4 != 0)
			N++;
		int re = 0;
		for (int t = 0; t < 4; t++)
			re += receive() << t;
		bitset<4> gal = dec4(re);
		int v = N / 4;
		int s = 0;
		for (int i = 0; i < 4; i++)
			if (gal[i])
				s += v;
		pair<int, int>r = decode(s);
		int sum = 0;
		bool ger1 = false;
		bool ger2 = false;
		for (int i = 0; i < 4; i++)
		{
			if (gal[i])
			{
				if (r.first > sum && r.first <= sum + v && ger1 == false)
				{
					for (int j = 0; j < i; j++)
						if (gal[j] == false)
							r.first += v;
					ger1 = true;
				}
				if (r.second > sum && r.second <= sum + v && ger2 == false)
				{
					for (int j = 0; j < i; j++)
						if (gal[j] == false)
							r.second += v;
					ger2 = true;
				}
				sum += v;
			}
		}
		r.first = min(r.first, N1);
		r.second = min(r.second, N1);
		return r;
	}
	return { -1, -1};
}
// int main()
// {
// 	for (int t = 0; t < 1000; t++)
// 	{
// 		int N = 1e9;
// 		int val = (t % N) + 1;
// 		encode(N, val);
// 		pair<int, int>v = decode(N);
// 		cout << v.first << " " << v.second << endl;
// 		assert(v.first == val || v.second == val);
// 	}
// }

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 1692 KB Output is correct
2 Correct 15 ms 1748 KB Output is correct
3 Correct 16 ms 1628 KB Output is correct
4 Correct 12 ms 1740 KB Output is correct
5 Correct 13 ms 1788 KB Output is correct
6 Correct 21 ms 1892 KB Output is correct
7 Correct 45 ms 1660 KB Output is correct

Subtask #2
60.999995 / 85.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 903 ms 1692 KB Output is partially correct
2 Partially correct 477 ms 1660 KB Output is partially correct
3 Partially correct 632 ms 1828 KB Output is partially correct
4 Partially correct 1003 ms 1816 KB Output is partially correct
5 Partially correct 828 ms 1840 KB Output is partially correct
6 Partially correct 812 ms 1748 KB Output is partially correct
7 Partially correct 2695 ms 1856 KB Output is partially correct
8 Partially correct 4118 ms 2048 KB Output is partially correct
9 Partially correct 3852 ms 1984 KB Output is partially correct
10 Partially correct 3718 ms 1972 KB Output is partially correct
11 Partially correct 3717 ms 2076 KB Output is partially correct
12 Partially correct 3806 ms 1884 KB Output is partially correct
13 Partially correct 4288 ms 1896 KB Output is partially correct
14 Partially correct 3836 ms 2116 KB Output is partially correct
15 Partially correct 2147 ms 2004 KB Output is partially correct
16 Partially correct 4203 ms 1816 KB Output is partially correct
17 Partially correct 1207 ms 1872 KB Output is partially correct
18 Partially correct 1222 ms 1984 KB Output is partially correct
19 Partially correct 1122 ms 1912 KB Output is partially correct
20 Partially correct 1052 ms 1916 KB Output is partially correct
21 Partially correct 1085 ms 1812 KB Output is partially correct
22 Partially correct 1540 ms 1840 KB Output is partially correct
23 Partially correct 1829 ms 1808 KB Output is partially correct
24 Correct 12 ms 1744 KB Output is correct
25 Correct 10 ms 1684 KB Output is correct
26 Correct 17 ms 1776 KB Output is correct
27 Correct 7 ms 1684 KB Output is correct
28 Correct 11 ms 1700 KB Output is correct
29 Correct 25 ms 1840 KB Output is correct
30 Correct 49 ms 1744 KB Output is correct