CSES - Datatähti 2019 alku - Results
Submission details
Task:Ruudukko
Sender:intoo
Submission time:2018-10-09 12:52:00 +0300
Language:C++
Status:READY
Result:31
Feedback
groupverdictscore
#1ACCEPTED31
#20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1details
#2ACCEPTED0.02 s1details
#3ACCEPTED0.02 s1details
#4ACCEPTED0.01 s1details
#5ACCEPTED0.02 s1details
#6ACCEPTED0.12 s1details
#7ACCEPTED0.03 s1details
#8ACCEPTED0.02 s1details
#9ACCEPTED0.02 s1details
#10ACCEPTED0.03 s1details
#11ACCEPTED0.02 s2details
#120.02 s2details
#130.02 s2details
#140.02 s2details
#150.01 s2details
#160.02 s2details
#170.02 s2details
#180.02 s2details
#190.02 s2details
#200.01 s2details
#210.02 s3details
#220.01 s3details
#230.01 s3details
#240.02 s3details
#250.01 s3details
#260.01 s3details
#270.01 s3details
#280.02 s3details
#290.02 s3details
#300.01 s3details

Code

#include <iostream>

using namespace std;

const long long P = 1e9+7;
int t[505][505], y[505], n;
bool r[505][3], s[505][3];
long long C = 0;

long long factorial(long long x) {
    long long f = 1;
    for (long long i = 1; i <= x; i++) {
        f = (f*i) % P;
    }
    return f;
} 

void brute(int y, int x) {
	if (x >= n) {
		brute(y+1,0);
		return;
	}
	if (y >= n) {
		bool b = 1;
		for (int i = 0; i < n; i++) if (!r[i][1] || !r[i][2] || !s[i][1] || !s[i][2]) b = 0;
		C = (C+b)%P;
		return;
	}
	if (!s[x][1] && !r[y][1] && !t[y][x]) {
		t[y][x] = 1;
		s[x][1] = 1;
		r[y][1] = 1;
		brute(y,x+1);
		t[y][x] = 0;
		s[x][1] = 0;
		r[y][1] = 0;
	}
	if (!s[x][2] && !r[y][2] && !t[y][x]) {
		t[y][x] = 2;
		s[x][2] = 1;
		r[y][2] = 1;
		brute(y,x+1);
		t[y][x] = 0;
		s[x][2] = 0;
		r[y][2] = 0;
	}
	brute(y,x+1);
}

int main() {
	char c;
	cin >> n;
	if (n > 5) {
		y[0] = 1;
		for (int i = 1; i <= n; i++) {
			y[i] = (i*y[i-1] + (i % 2 ? -1 : 1)) % P;
		}
		y[n+1] = (y[n]*factorial(n)) % P;
		cout << y[n+1] << endl;
		return 0;
	}
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			cin >> c;
			if (c == 'A') {
				t[i][j] = 1;
				r[i][1] = 1;
				s[j][1] = 1;
			}
			if (c == 'B') {
				t[i][j] = 2;
				r[i][2] = 1;
				s[j][2] = 1;
			}
		}
	}
	brute(0,0);
	cout << C << endl;
}

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: ACCEPTED

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

correct output
306442892

user output
306442892

Test 12

Group: 2

Verdict:

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

correct output
694861480

user output
390303679

Test 13

Group: 2

Verdict:

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

correct output
555319110

user output
246594252

Test 14

Group: 2

Verdict:

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

correct output
108372237

user output
-345295836

Test 15

Group: 2

Verdict:

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

correct output
259107857

user output
-399518164

Test 16

Group: 2

Verdict:

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

correct output
19906314

user output
972700154

Test 17

Group: 2

Verdict:

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

correct output
224313667

user output
-750975233

Test 18

Group: 2

Verdict:

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

correct output
929574601

user output
400796543

Test 19

Group: 2

Verdict:

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

correct output
600226043

user output
319220693

Test 20

Group: 2

Verdict:

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

correct output
198353194

user output
-543680714

Test 21

Group: 3

Verdict:

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

correct output
840243733

user output
319220693

Test 22

Group: 3

Verdict:

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

correct output
4146290

user output
319220693

Test 23

Group: 3

Verdict:

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

correct output
173518884

user output
319220693

Test 24

Group: 3

Verdict:

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

correct output
20044800

user output
319220693

Test 25

Group: 3

Verdict:

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

correct output
2

user output
319220693

Test 26

Group: 3

Verdict:

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

correct output
121064146

user output
-543680714

Test 27

Group: 3

Verdict:

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

correct output
848435259

user output
-543680714

Test 28

Group: 3

Verdict:

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

correct output
296240911

user output
-543680714

Test 29

Group: 3

Verdict:

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

correct output
2196

user output
-543680714

Test 30

Group: 3

Verdict:

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

correct output
1

user output
-543680714