CSES - Datatähti 2018 alku

Submission details
Task:	Bittijono
Sender:	Yytsi
Submission time:	2017-10-03 23:19:44 +0300
Language:	C++
Status:	READY
Result:	49

Feedback
group	verdict	score
#1	ACCEPTED	7
#2	ACCEPTED	15
#3	ACCEPTED	27
#4	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.06 s	1	details
#2	ACCEPTED	0.05 s	1	details
#3	ACCEPTED	0.03 s	1	details
#4	ACCEPTED	0.04 s	1	details
#5	ACCEPTED	0.06 s	1	details
#6	ACCEPTED	0.04 s	1	details
#7	ACCEPTED	0.04 s	1	details
#8	ACCEPTED	0.05 s	1	details
#9	ACCEPTED	0.04 s	1	details
#10	ACCEPTED	0.03 s	1	details
#11	ACCEPTED	0.04 s	2	details
#12	ACCEPTED	0.04 s	2	details
#13	ACCEPTED	0.06 s	2	details
#14	ACCEPTED	0.05 s	2	details
#15	ACCEPTED	0.05 s	2	details
#16	ACCEPTED	0.05 s	2	details
#17	ACCEPTED	0.04 s	2	details
#18	ACCEPTED	0.05 s	2	details
#19	ACCEPTED	0.03 s	2	details
#20	ACCEPTED	0.04 s	2	details
#21	ACCEPTED	0.05 s	3	details
#22	ACCEPTED	0.05 s	3	details
#23	ACCEPTED	0.05 s	3	details
#24	ACCEPTED	0.04 s	3	details
#25	ACCEPTED	0.05 s	3	details
#26	ACCEPTED	0.04 s	3	details
#27	ACCEPTED	0.05 s	3	details
#28	ACCEPTED	0.04 s	3	details
#29	ACCEPTED	0.05 s	3	details
#30	ACCEPTED	0.04 s	3	details
#31	ACCEPTED	0.08 s	4	details
#32	WRONG ANSWER	0.22 s	4	details
#33	WRONG ANSWER	0.19 s	4	details
#34	ACCEPTED	0.05 s	4	details
#35	WRONG ANSWER	0.29 s	4	details
#36	ACCEPTED	0.10 s	4	details
#37	WRONG ANSWER	0.23 s	4	details
#38	WRONG ANSWER	0.07 s	4	details
#39	ACCEPTED	0.14 s	4	details
#40	ACCEPTED	0.09 s	4	details

Code

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int bounds[27] = {1, 3, 6, 11, 19, 32, 53, 87, 142, 231, 375, 608, 985, 1595, 2582, 4179,
              6763, 10944, 17709, 28655, 46366, 75023, 121391, 196416, 317809, 514227, 832038};

int numberOfDistinct(string str)
{
	int ones = 0;
	int zeros = 0;
	int distinct = 0;
	
	for (size_t i = 0; i < str.length(); i++)
	{
		char bit = str[i];
		bool isOne = bit == '1';
		
		int newSum = 1 + distinct;
		distinct = distinct - (isOne ? ones : zeros) + newSum;
		if (isOne) ones = newSum;
		else zeros = newSum;
	}
	
	return distinct;
}

int binSizeLowerBound(int n)
{
	for (int i = 26; i != 0; i--)
	{
		int bound = bounds[i];
		if (bound < n)
		{
			return i + 1;
		}
	}
	return 1;
}

string convertToBitString(size_t value)
{
	string str(32, '0');
	
	for (size_t i = 0; i < 32; i++)
	{
		if ((1LL << i) & value)
			str[31 - i] = '1';
	}
	str = str.substr(str.find_first_not_of("0"));
	
	return str;
}


string findBitstring(string b, int n, int tries)
{
	for (int test = 0; test < tries; test++)
	{
		int maxFitness = 123456879, fitIndex = -1;
		while (true)
		{
			bool foundImprovement = false;
			for (size_t i = 0; i < b.size(); i++)
			{
				char bit = b[i];
				char rev = "01"[bit == '0'];
				b[i] = rev;
				
				int distinctSubs = numberOfDistinct(b);
				//cout << b << " : " << distinctSubs << "\n";
				
				int fitness = abs(distinctSubs - n);
				if (fitness == 0)
				{
					// Solution found.
					return b;
				}
				if (fitness < maxFitness)
				{
					maxFitness = fitness;
					fitIndex = (int)i;
					foundImprovement = true;
				}
				
				b[i] = bit;
			}
			
			if (foundImprovement) b[fitIndex] = "01"[b[fitIndex] == '0'];
			else
			{
				//cout << "No improvement found :-( shuffling\n";
				random_shuffle(b.begin(), b.end());
				break;
			}
		}
	}
	return "fail";
}


int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	/*
	long n;
	cin >> n;*/
	//int base = (int)log2(n);
	
	//cout << base << "\n";
	int n;
	cin >> n;
	bool found = false;
	string chains[28]={"10101010101010101010101010101", "10010010010010010010010010011",
					   "10001000100010001000100010001", "10000100001000010000100001000",
					   "10000010000010000010000010001", "10011001100110011001100110010",
					   "10110110110110110110110110111", "11111111111111111111111111111",
					   "11111000001111100000111110001", "10100101001010010100101001010",
					   "11001100110011001100110011001", "10011100001111100000011111110",
					   "11110000111100001111000011111", "10010100101001010010100101000",
					   "11101110111011101110111011100", "11101001110010010111000110011",
					   "10010110010010110010001001100", "10010011000101101101101001001",
					   "00010110010010110010001001100", "00010011000101101101101001001",
					   "10100101010101010011010110110", "00100101001101010101010110101",
					   "11011010110010101010101001010", "01011010101010101100101001000",
					   "10100100100100101101011010110", "10100100100100101101011010110",
					   "01011011011011010010100101001", "11011011011011010010100101001"};
	
	
	
	int len = binSizeLowerBound(n);
	int low = len + 1;
	int high = len + 2;
	
	for (int i = 0; i < 27; i++)
		if (bounds[i] == n) found = true;
	
	
	if (n == 1) cout << "1";
	else if (found) cout << chains[0].substr(0, low);
	else
	{
		for (int i = 0; i < 28; i++)
		{
			string p1 = chains[i].substr(0, low);
			string p2 = chains[i].substr(0, high);
			
			string res1 = findBitstring(p1, n, 120);
			if (res1 == "fail")
			{
				res1 = findBitstring(p2, n, 120);
			}
			
			if (res1 != "fail")
			{
				cout << res1;
				break;
			}
		}		
	}
	
	/*
	cout << findBitstring("010101010100000001010101010", 832038, 1000) << "\n";
	cout << findBitstring("100010001000100010001000100", 832038, 1000) << "\n";
	cout << findBitstring("010101010100000001010101010", 832038, 1000) << "\n";
	cout << findBitstring("010101010100000001010101010", 832038, 1000) << "\n";*/

	
	//cout << m << "\n";
	//cout << numberOfDistinct(str) << "\n";
	
	return 0;
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
`1` view save

correct output
`1` view save

user output
`1` view save

Test 2

Group: 1

Verdict: ACCEPTED

input
`2` view save

correct output
`11` view save

user output
`00` view save

Test 3

Group: 1

Verdict: ACCEPTED

input
`3` view save

correct output
`10` view save

user output
`10` view save

Test 4

Group: 1

Verdict: ACCEPTED

input
`4` view save

correct output
`1111` view save

user output
`1111` view save

Test 5

Group: 1

Verdict: ACCEPTED

input
`5` view save

correct output
`110` view save

user output
`001` view save

Test 6

Group: 1

Verdict: ACCEPTED

input
`6` view save

correct output
`101` view save

user output
`101` view save

Test 7

Group: 1

Verdict: ACCEPTED

input
`7` view save

correct output
`1110` view save

user output
`1110` view save

Test 8

Group: 1

Verdict: ACCEPTED

input
`8` view save

correct output
`1100` view save

user output
`0011` view save

Test 9

Group: 1

Verdict: ACCEPTED

input
`9` view save

correct output
`1101` view save

user output
`0010` view save

Test 10

Group: 1

Verdict: ACCEPTED

input
`10` view save

correct output
`1001` view save

user output
`0110` view save

Test 11

Group: 2

Verdict: ACCEPTED

input
`38` view save

correct output
`1101011` view save

user output
`0010100` view save

Test 12

Group: 2

Verdict: ACCEPTED

input
`13` view save

correct output
`11011` view save

user output
`11011` view save

Test 13

Group: 2

Verdict: ACCEPTED

input
`90` view save

correct output
`111001010` view save

user output
`011011101` view save

Test 14

Group: 2

Verdict: ACCEPTED

input
`25` view save

correct output
`110010` view save

user output
`101100` view save

Test 15

Group: 2

Verdict: ACCEPTED

input
`82` view save

correct output
`111001101` view save

user output
`000110010` view save

Test 16

Group: 2

Verdict: ACCEPTED

input
`94` view save

correct output
`1100011110` view save

user output
`0111100011` view save

Test 17

Group: 2

Verdict: ACCEPTED

input
`100` view save

correct output
`1111001001` view save

user output
`1100011000` view save

Test 18

Group: 2

Verdict: ACCEPTED

input
`99` view save

correct output
`110010010` view save

user output
`101101100` view save

Test 19

Group: 2

Verdict: ACCEPTED

input
`98` view save

correct output
`110110010` view save

user output
`101100100` view save

Test 20

Group: 2

Verdict: ACCEPTED

input
`92` view save

correct output
`100110001` view save

user output
`100110001` view save

Test 21

Group: 3

Verdict: ACCEPTED

input
`1666` view save

correct output
`101101100100101` view save

user output
`010010011011010` view save

Test 22

Group: 3

Verdict: ACCEPTED

input
`897` view save

correct output
`11101001101010` view save

user output
`00100100110010` view save

Test 23

Group: 3

Verdict: ACCEPTED

input
`4466` view save

correct output
`111101010110100101` view save

user output
`001011100011011010` view save

Test 24

Group: 3

Verdict: ACCEPTED

input
`4240` view save

correct output
`11011001011010101` view save

user output
`00100110100101010` view save

Test 25

Group: 3

Verdict: ACCEPTED

input
`3089` view save

correct output
`1011001010100101` view save

user output
`1010010101001101` view save

Test 26

Group: 3

Verdict: ACCEPTED

input
`4697` view save

correct output
`11010101101010110` view save

user output
`10101001001001010` view save

Test 27

Group: 3

Verdict: ACCEPTED

input
`4608` view save

correct output
`11010110101001010` view save

user output
`01010010101101011` view save

Test 28

Group: 3

Verdict: ACCEPTED

input
`4625` view save

correct output
`111011001100101001` view save

user output
`100101000110111001` view save

Test 29

Group: 3

Verdict: ACCEPTED

input
`4611` view save

correct output
`11010101010101100` view save

user output
`01010010100101011` view save

Test 30

Group: 3

Verdict: ACCEPTED

input
`4917` view save

correct output
`10110100101010110` view save

user output
`01001011010101001` view save

Test 31

Group: 4

Verdict: ACCEPTED

input
`178555` view save

correct output
`1011010110110101010110110` view save

user output
`1011010110110101010110110` view save

Test 32

Group: 4

Verdict: WRONG ANSWER

input
`864856` view save

correct output
`10111010110110100100101010010` view save

user output
(empty)

Test 33

Group: 4

Verdict: WRONG ANSWER

input
`112146` view save

correct output
`1101110101011001100100110` view save

user output
(empty)

Test 34

Group: 4

Verdict: ACCEPTED

input
`741124` view save

correct output
`1011010011010101100101011010` view save

user output
`0100101100101010011010100101` view save

Test 35

Group: 4

Verdict: WRONG ANSWER

input
`511902` view save

correct output
`1011010100011010100101001110` view save

user output
(empty)

Test 36

Group: 4

Verdict: ACCEPTED

input
`920019` view save

correct output
`11100100101101010101001101010` view save

user output
`10100101010010110110010100010` view save

Test 37

Group: 4

Verdict: WRONG ANSWER

input
`933943` view save

correct output
`10101011010100100110100111001` view save

user output
(empty)

Test 38

Group: 4

Verdict: WRONG ANSWER

input
`973410` view save

correct output
`1011010101011010101010101001` view save

user output
`01101010010100100100110011010` view save

Test 39

Group: 4

Verdict: ACCEPTED

input
`954943` view save

correct output
`10110110010011010100100110101` view save

user output
`10101100100101011001001101101` view save

Test 40

Group: 4

Verdict: ACCEPTED

input
`911674` view save

correct output
`1010110010110101010101010110` view save

user output
`0110101010101010110100110101` view save

Datatähti 2018 alku

Bittijono

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Test 25

Test 26

Test 27

Test 28

Test 29

Test 30

Test 31

Test 32

Test 33

Test 34

Test 35

Test 36

Test 37

Test 38

Test 39

Test 40

Tasks

Submissions (Yytsi)