CSES - Putka Open 2020 – 1/5

Submission details
Task:	Lista
Sender:	Grez
Submission time:	2020-09-06 13:21:47 +0300
Language:	C++ (C++17)
Status:	READY
Result:	100

Feedback
group	verdict	score
#1	ACCEPTED	21
#2	ACCEPTED	38
#3	ACCEPTED	41

Test results
test	verdict	time	group
#1	ACCEPTED	0.01 s	1, 2, 3	details
#2	ACCEPTED	0.01 s	1, 2, 3	details
#3	ACCEPTED	0.01 s	1, 2, 3	details
#4	ACCEPTED	0.01 s	1, 2, 3	details
#5	ACCEPTED	0.01 s	1, 2, 3	details
#6	ACCEPTED	0.01 s	1, 2, 3	details
#7	ACCEPTED	0.01 s	1, 2, 3	details
#8	ACCEPTED	0.01 s	1, 2, 3	details
#9	ACCEPTED	0.01 s	1, 2, 3	details
#10	ACCEPTED	0.01 s	2, 3	details
#11	ACCEPTED	0.01 s	2, 3	details
#12	ACCEPTED	0.01 s	2, 3	details
#13	ACCEPTED	0.01 s	2, 3	details
#14	ACCEPTED	0.01 s	2, 3	details
#15	ACCEPTED	0.01 s	2, 3	details
#16	ACCEPTED	0.01 s	3	details
#17	ACCEPTED	0.01 s	3	details
#18	ACCEPTED	0.01 s	3	details
#19	ACCEPTED	0.01 s	3	details
#20	ACCEPTED	0.01 s	3	details
#21	ACCEPTED	0.01 s	3	details

Code

#include <iostream>

using namespace std;

bool *sieve;
int *ans;
int amo;


void swap(int a, int b)
{
	if (a == b) return;
	int t = ans[a];
	ans[a] = ans[b];
	ans[b] = t;
}
bool recurse(int pos)
{
	for (int other = pos; other >= 0; other -= 2)
	{
		if (sieve[(ans[other] + ans[pos + 1]) / 2]) continue;
		if (pos == 0) return true;
		swap(pos, other);
		if (recurse(pos - 1)) return true;
		swap(pos, other); //swap back
	}
	return false;
}

int main() {
    cin >> amo;
    ans = new int[amo];
    sieve = new bool[amo];

	for (int i=0; i<amo; i++) { 
		sieve[i] = false;
		ans[i] = i+1;
	}

	int maxPrime = amo * 2;
	for (int mul = 3; (mul * mul) < maxPrime; mul += 2)
	{
		for (int hole = mul / 2 + mul; hole < amo; hole += mul)
		{
			sieve[hole] = true;
		}
	}


	if (recurse(amo - 2))
	{
		for (int i=0; i<amo; i++) {
			cout << ans[i];
			cout << ' ';
		}
		cout << endl;
	}

	delete[] sieve;
	delete[] ans;

}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
`2` view save

correct output
`1 2` view save

user output
`1 2` view save

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
`3` view save

correct output
`1 2 3` view save

user output
`1 2 3` view save

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
`4` view save

correct output
`1 2 3 4` view save

user output
`1 2 3 4` view save

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
`5` view save

correct output
`3 4 1 2 5` view save

user output
`1 4 3 2 5` view save

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

input
`6` view save

correct output
`3 4 1 2 5 6` view save

user output
`1 4 3 2 5 6` view save

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

input
`7` view save

correct output
`3 4 1 2 5 6 7` view save

user output
`1 4 3 2 5 6 7` view save

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

input
`8` view save

correct output
`7 6 5 2 1 4 3 8` view save

user output
`1 2 3 4 7 6 5 8` view save

Test 8

Group: 1, 2, 3

Verdict: ACCEPTED

input
`9` view save

correct output
`7 6 5 2 1 4 3 8 9` view save

user output
`1 2 3 4 7 6 5 8 9` view save

Test 9

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10` view save

correct output
`7 6 5 2 1 4 3 8 9 10` view save

user output
`1 2 3 4 7 6 5 8 9 10` view save

Test 10

Group: 2, 3

Verdict: ACCEPTED

input
`19` view save

correct output
`17 14 3 8 15 16 13 6 5 2 1 4 9...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` view save

Test 11

Group: 2, 3

Verdict: ACCEPTED

input
`56` view save

correct output
`55 54 53 50 51 52 49 48 13 28 ...` view save

user output
`1 2 3 4 7 6 5 14 9 10 13 16 15...` Truncated

Test 12

Group: 2, 3

Verdict: ACCEPTED

input
`70` view save

correct output
`67 4 1 2 9 32 35 38 65 66 61 4...` view save

user output
`1 2 3 4 7 6 5 14 9 10 13 16 15...` Truncated

Test 13

Group: 2, 3

Verdict: ACCEPTED

input
`76` view save

correct output
`73 66 61 42 59 54 53 50 51 52 ...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 14

Group: 2, 3

Verdict: ACCEPTED

input
`90` view save

correct output
`87 86 11 18 29 44 45 16 55 58 ...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 15

Group: 2, 3

Verdict: ACCEPTED

input
`100` view save

correct output
`97 96 95 78 25 82 81 56 71 68 ...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 16

Group: 3

Verdict: ACCEPTED

input
`154` view save

correct output
`151 6 5 92 137 134 149 84 143 ...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 17

Group: 3

Verdict: ACCEPTED

input
`430` view save

correct output
`427 426 371 372 367 376 375 35...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 18

Group: 3

Verdict: ACCEPTED

input
`629` view save

correct output
`627 404 227 146 83 150 77 74 3...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 19

Group: 3

Verdict: ACCEPTED

input
`833` view save

correct output
`829 828 793 574 523 516 515 51...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 20

Group: 3

Verdict: ACCEPTED

input
`885` view save

correct output
`883 724 723 878 881 726 721 71...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Test 21

Group: 3

Verdict: ACCEPTED

input
`1000` view save

correct output
`997 996 737 884 995 492 991 20...` view save

user output
`1 4 3 2 5 6 7 10 9 8 11 12 17 ...` Truncated

Putka Open 2020 – 1/5

Lista

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

Tasks

Submissions (Grez)