CSES - Datatähti 2019 alku - Results
Submission details
Task:Ruudukko
Sender:Olli
Submission time:2018-10-02 15:28:22 +0300
Language:C++
Status:READY
Result:31
Feedback
groupverdictscore
#1ACCEPTED31
#20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.03 s1details
#2ACCEPTED0.02 s1details
#3ACCEPTED0.01 s1details
#4ACCEPTED0.02 s1details
#5ACCEPTED0.01 s1details
#6ACCEPTED0.03 s1details
#7ACCEPTED0.01 s1details
#8ACCEPTED0.03 s1details
#9ACCEPTED0.02 s1details
#10ACCEPTED0.01 s1details
#11--2details
#12--2details
#13--2details
#14--2details
#150.03 s2details
#160.03 s2details
#170.03 s2details
#180.04 s2details
#190.02 s2details
#200.03 s2details
#210.04 s3details
#220.03 s3details
#230.02 s3details
#240.02 s3details
#250.03 s3details
#260.03 s3details
#270.03 s3details
#280.03 s3details
#290.04 s3details
#300.03 s3details

Code

#include <iostream>

using namespace std;

const int N = 10;
const int M = 1e9 + 7;


char t[N][N];

int ans;

int conA[N];
int conB[N];

int n;

void dfs(int r, char c) {
	if(r == n+1) {
		++ans;
		if(ans == M) {
			ans = 0;
		}
		return;
	}
	if(c == 'A') {
		if(conA[r] != 0) {
			dfs(r, 'B');
		} else {
			for(int y = 1; y <= n; ++y) {
				if(t[y][r] == '.') {
					bool works = true;
					for(int x = 1; x <= n; ++x) {
						if(t[y][x] == 'A') {
							works = false;
							break;
						}
					}
					if(!works) continue;
					t[y][r] = 'A';
					dfs(r, 'B');
					t[y][r] = '.';
				}
			}
		}
	} else {
		if(conB[r] != 0) {
			dfs(r+1, 'A');
		} else {
			for(int y = 1; y <= n; ++y) {
				if(t[y][r] == '.') {
					bool works = true;
					for(int x = 1; x <= n; ++x) {
						if(t[y][x] == 'B') {
							works = false;
							break;
						}
					}
					if(!works) continue;
					t[y][r] = 'B';
					dfs(r+1, 'A');
					t[y][r] = '.';
				}
			}
		}
	}
}

int main() {

	cin >> n;
	for(int y = 1; y <= n; ++y) {
		for(int x = 1; x <= n; ++x) {
			cin >> t[y][x];
			if(t[y][x] == 'A') {
				conA[x] = y;
			}
			if(t[y][x] == 'B') {
				conB[x] = y;
			}
		}
	}

	dfs(1, 'A');
	cout << ans << "\n";


}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
2
..
..

correct output
2

user output
2

Test 2

Group: 1

Verdict: ACCEPTED

input
2
..
A.

correct output
1

user output
1

Test 3

Group: 1

Verdict: ACCEPTED

input
2
B.
.A

correct output
0

user output
0

Test 4

Group: 1

Verdict: ACCEPTED

input
3
...
...
...

correct output
12

user output
12

Test 5

Group: 1

Verdict: ACCEPTED

input
4
....
....
....
....

correct output
216

user output
216

Test 6

Group: 1

Verdict: ACCEPTED

input
5
.....
.....
.....
.....
...

correct output
5280

user output
5280

Test 7

Group: 1

Verdict: ACCEPTED

input
5
....A
.....
.....
.....
...

correct output
264

user output
264

Test 8

Group: 1

Verdict: ACCEPTED

input
5
B....
.....
.....
.A.B.
...

correct output
22

user output
22

Test 9

Group: 1

Verdict: ACCEPTED

input
5
B.A..
....A
.....
A.B..
...

correct output
2

user output
2

Test 10

Group: 1

Verdict: ACCEPTED

input
5
A.B..
BA...
.B.A.
...BA
...

correct output
1

user output
1

Test 11

Group: 2

Verdict:

input
10
..........
..........
..........
..........
...

correct output
306442892

user output
(empty)

Test 12

Group: 2

Verdict:

input
50
.................................

correct output
694861480

user output
(empty)

Test 13

Group: 2

Verdict:

input
111
.................................

correct output
555319110

user output
(empty)

Test 14

Group: 2

Verdict:

input
222
.................................

correct output
108372237

user output
(empty)

Test 15

Group: 2

Verdict:

input
333
.................................

correct output
259107857

user output
(empty)

Test 16

Group: 2

Verdict:

input
444
.................................

correct output
19906314

user output
(empty)

Test 17

Group: 2

Verdict:

input
497
.................................

correct output
224313667

user output
(empty)

Test 18

Group: 2

Verdict:

input
498
.................................

correct output
929574601

user output
(empty)

Test 19

Group: 2

Verdict:

input
499
.................................

correct output
600226043

user output
(empty)

Test 20

Group: 2

Verdict:

input
500
.................................

correct output
198353194

user output
(empty)

Test 21

Group: 3

Verdict:

input
499
.................................

correct output
840243733

user output
(empty)

Test 22

Group: 3

Verdict:

input
499
........................A........

correct output
4146290

user output
(empty)

Test 23

Group: 3

Verdict:

input
499
B.........A......................

correct output
173518884

user output
(empty)

Test 24

Group: 3

Verdict:

input
499
...A....B........................

correct output
20044800

user output
(empty)

Test 25

Group: 3

Verdict:

input
499
AB...............................

correct output
2

user output
(empty)

Test 26

Group: 3

Verdict:

input
500
.................................

correct output
121064146

user output
(empty)

Test 27

Group: 3

Verdict:

input
500
.................................

correct output
848435259

user output
(empty)

Test 28

Group: 3

Verdict:

input
500
.....B........A..................

correct output
296240911

user output
(empty)

Test 29

Group: 3

Verdict:

input
500
.A......B........................

correct output
2196

user output
(empty)

Test 30

Group: 3

Verdict:

input
500
...AB............................

correct output
1

user output
(empty)