CSES - Datatähti 2019 alku

Submission details
Task:	Ruudukko
Sender:	paavoee
Submission time:	2018-10-14 22:29:04 +0300
Language:	C++
Status:	READY
Result:	31

Feedback
group	verdict	score
#1	ACCEPTED	31
#2	TIME LIMIT EXCEEDED	0
#3	TIME LIMIT EXCEEDED	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.02 s	1	details
#2	ACCEPTED	0.03 s	1	details
#3	ACCEPTED	0.03 s	1	details
#4	ACCEPTED	0.01 s	1	details
#5	ACCEPTED	0.03 s	1	details
#6	ACCEPTED	0.02 s	1	details
#7	ACCEPTED	0.01 s	1	details
#8	ACCEPTED	0.01 s	1	details
#9	ACCEPTED	0.03 s	1	details
#10	ACCEPTED	0.01 s	1	details
#11	TIME LIMIT EXCEEDED	--	2	details
#12	TIME LIMIT EXCEEDED	--	2	details
#13	TIME LIMIT EXCEEDED	--	2	details
#14	TIME LIMIT EXCEEDED	--	2	details
#15	TIME LIMIT EXCEEDED	--	2	details
#16	TIME LIMIT EXCEEDED	--	2	details
#17	TIME LIMIT EXCEEDED	--	2	details
#18	TIME LIMIT EXCEEDED	--	2	details
#19	TIME LIMIT EXCEEDED	--	2	details
#20	TIME LIMIT EXCEEDED	--	2	details
#21	TIME LIMIT EXCEEDED	--	3	details
#22	TIME LIMIT EXCEEDED	--	3	details
#23	TIME LIMIT EXCEEDED	--	3	details
#24	TIME LIMIT EXCEEDED	--	3	details
#25	ACCEPTED	0.02 s	3	details
#26	TIME LIMIT EXCEEDED	--	3	details
#27	TIME LIMIT EXCEEDED	--	3	details
#28	TIME LIMIT EXCEEDED	--	3	details
#29	ACCEPTED	0.04 s	3	details
#30	ACCEPTED	0.01 s	3	details

Code

#include <cmath>
#include <iostream>
#include <vector>

using namespace std;

static constexpr long mod = pow(10, 9) + 7;

constexpr int8_t A = 1, B = 2;

unsigned long count(unsigned int row, unsigned int n, vector<vector<char>>& t,
		vector<int8_t>& rowd, vector<int8_t>& cold) {
	if (!(rowd[row] & A)) {
		unsigned long r = 0;
		for (unsigned int j = 0; j < n; j++) {
			if (t[row][j] != '.' || (cold[j] & A)) continue;
			t[row][j] = 'A';
			rowd[row] |= A;
			cold[j] |= A;
			r += count(row, n, t, rowd, cold);
			r %= mod;
			t[row][j] = '.';
			rowd[row] ^= A;
			cold[j] ^= A;
		}
		return r;
	} else if (!(rowd[row] & B)) {
		unsigned long r = 0;
		for (unsigned int j = 0; j < n; j++) {
			if (t[row][j] != '.' || (cold[j] & B)) continue;
			t[row][j] = 'B';
			rowd[row] |= B;
			cold[j] |= B;
			r += count(row, n, t, rowd, cold);
			r %= mod;
			t[row][j] = '.';
			rowd[row] ^= B;
			cold[j] ^= B;
		}
		return r;
	} else if (row < n - 1)
		return count(row + 1, n, t, rowd, cold);
	else return 1;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	unsigned int n;
	cin >> n;
	vector<vector<char>> t(n);
	for (unsigned int i = 0; i < n; i++) {
		t[i] = vector<char>(n);
		for (unsigned int j = 0; j < n; j++)
			cin >> t[i][j];
	}
	vector<int8_t> rowd(n);
	for (unsigned int i = 0; i < n; i++) {
		int8_t bits = 0;
		for (unsigned int j = 0; j < n; j++) {
			if (t[i][j] == 'A') bits |= A;
			else if (t[i][j] == 'B') bits |= B;
		}
		rowd[i] = bits;
	}
	vector<int8_t> cold(n);
	for (unsigned int j = 0; j < n; j++) {
		int8_t bits = 0;
		for (unsigned int i = 0; i < n; i++) {
			if (t[i][j] == 'A') bits |= A;
			else if (t[i][j] == 'B') bits |= B;
		}
		cold[j] = bits;
	}

//	cout << "rowd\n";
//	for (unsigned int i = 0; i < n; i++)
//		cout << (int) rowd[i] << '\n';
//	cout << "cold\n";
//	for (unsigned int i = 0; i < n; i++)
//		cout << (int) cold[i] << ' ';
//	cout << '\n';

	cout << count(0, n, t, rowd, cold) << '\n';
	return 0;
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
`2 .. ..` view save

correct output
`2` view save

user output
`2` view save

Test 2

Group: 1

Verdict: ACCEPTED

input
`2 .. A.` view save

correct output
`1` view save

user output
`1` view save

Test 3

Group: 1

Verdict: ACCEPTED

input
`2 B. .A` view save

correct output
`0` view save

user output
`0` view save

Test 4

Group: 1

Verdict: ACCEPTED

input
`3 ... ... ...` view save

correct output
`12` view save

user output
`12` view save

Test 5

Group: 1

Verdict: ACCEPTED

input
`4 .... .... .... ....` view save

correct output
`216` view save

user output
`216` view save

Test 6

Group: 1

Verdict: ACCEPTED

input
`5 ..... ..... ..... ..... ...` view save

correct output
`5280` view save

user output
`5280` view save

Test 7

Group: 1

Verdict: ACCEPTED

input
`5 ....A ..... ..... ..... ...` view save

correct output
`264` view save

user output
`264` view save

Test 8

Group: 1

Verdict: ACCEPTED

input
`5 B.... ..... ..... .A.B. ...` view save

correct output
`22` view save

user output
`22` view save

Test 9

Group: 1

Verdict: ACCEPTED

input
`5 B.A.. ....A ..... A.B.. ...` view save

correct output
`2` view save

user output
`2` view save

Test 10

Group: 1

Verdict: ACCEPTED

input
`5 A.B.. BA... .B.A. ...BA ...` view save

correct output
`1` view save

user output
`1` view save

Test 11

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`10 .......... .......... .......... .......... ...` view save

correct output
`306442892` view save

user output
(empty)

Test 12

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`50 .................................` view save

correct output
`694861480` view save

user output
(empty)

Test 13

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`111 .................................` view save

correct output
`555319110` view save

user output
(empty)

Test 14

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`222 .................................` view save

correct output
`108372237` view save

user output
(empty)

Test 15

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`333 .................................` view save

correct output
`259107857` view save

user output
(empty)

Test 16

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`444 .................................` view save

correct output
`19906314` view save

user output
(empty)

Test 17

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`497 .................................` view save

correct output
`224313667` view save

user output
(empty)

Test 18

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`498 .................................` view save

correct output
`929574601` view save

user output
(empty)

Test 19

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`499 .................................` view save

correct output
`600226043` view save

user output
(empty)

Test 20

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 .................................` view save

correct output
`198353194` view save

user output
(empty)

Test 21

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`499 .................................` view save

correct output
`840243733` view save

user output
(empty)

Test 22

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`499 ........................A........` view save

correct output
`4146290` view save

user output
(empty)

Test 23

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`499 B.........A......................` view save

correct output
`173518884` view save

user output
(empty)

Test 24

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`499 ...A....B........................` view save

correct output
`20044800` view save

user output
(empty)

Test 25

Group: 3

Verdict: ACCEPTED

input
`499 AB...............................` view save

correct output
`2` view save

user output
`2` view save

Test 26

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`500 .................................` view save

correct output
`121064146` view save

user output
(empty)

Test 27

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`500 .................................` view save

correct output
`848435259` view save

user output
(empty)

Test 28

Group: 3

Verdict: TIME LIMIT EXCEEDED

input
`500 .....B........A..................` view save

correct output
`296240911` view save

user output
(empty)

Test 29

Group: 3

Verdict: ACCEPTED

input
`500 .A......B........................` view save

correct output
`2196` view save

user output
`2196` view save

Test 30

Group: 3

Verdict: ACCEPTED

input
`500 ...AB............................` view save

correct output
`1` view save

user output
`1` view save

Datatähti 2019 alku

Ruudukko

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

Tasks

Submissions (paavoee)