CSES - Datatähti 2019 alku - Results
Submission details
Task:Ruudukko
Sender:kaurip
Submission time:2018-10-14 21:50:51 +0300
Language:Python3
Status:READY
Result:14
Feedback
groupverdictscore
#10
#2ACCEPTED14
#30
Test results
testverdicttimegroup
#1ACCEPTED0.05 s1details
#2ACCEPTED0.06 s1details
#30.07 s1details
#4ACCEPTED0.07 s1details
#5ACCEPTED0.07 s1details
#6ACCEPTED0.08 s1details
#7ACCEPTED0.05 s1details
#8--1details
#9--1details
#10--1details
#11ACCEPTED0.06 s2details
#12ACCEPTED0.07 s2details
#13ACCEPTED0.07 s2details
#14ACCEPTED0.07 s2details
#15ACCEPTED0.07 s2details
#16ACCEPTED0.06 s2details
#17ACCEPTED0.07 s2details
#18ACCEPTED0.07 s2details
#19ACCEPTED0.06 s2details
#20ACCEPTED0.07 s2details
#21--3details
#22--3details
#23--3details
#24--3details
#25--3details
#26--3details
#27--3details
#28--3details
#29--3details
#30--3details

Code

from math import factorial

from functools import reduce
from operator import mul    # or mul=lambda x,y:x*y
from fractions import Fraction

def nCk(nx,kx): 
#    return int( reduce(mul, (Fraction(nx-i, i+1) for i in range(kx)), 1) )
    # (factorial(nx)%1000000007)/(factorial(kx))
    return int(Fraction(factorial(nx), factorial(kx)*factorial(nx-kx)))
    

def derange(num):
    if num == 0 or num == 1:
        return 1-num
    return num*(derange(num-1))+(-1)**num

def bways(numn,numb):
    if numb == 0:
        return derange(numn)
    
    #ei toimi
    if numb == 1:
        return derange(numn)//(numn-numb)

    while True:
        continue


n=int(input())

matchesa = 0
matchesb = 0

for x in range(0,n):
    # grid.append(list(input()))
    row = input()
    matchesa += row.count("A")
    matchesb += row.count("B")

# count = int(factorial(n)*factorial(n)*dfactorial(n-1)/dfactorial(n))
# count = factorial(n)**2*consmult(n*n-2*n, n)/consmult(n*n-n, n)
# count = factorial(n)*(factorial(n)-(1-(1/n+(n-2)/n*(n-2)/(n-1)))*n)
# count = factorial(n)*n/(n-1)
# count = factorial(n)**2*((n-1)/n)**n
# count = factorial(n)**2*factorial(n)/(n**(n))
# count = int(factorial(n-matchesa)*derange(n-matchesb))%1000000007
count = int(factorial(n-matchesa)*bways(n,matchesb))%1000000007
print(count)

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:

input
2
B.
.A

correct output
0

user output
1

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:

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

correct output
22

user output
(empty)

Test 9

Group: 1

Verdict:

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

correct output
2

user output
(empty)

Test 10

Group: 1

Verdict:

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

correct output
1

user output
(empty)

Test 11

Group: 2

Verdict: ACCEPTED

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

correct output
306442892

user output
306442892

Test 12

Group: 2

Verdict: ACCEPTED

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

correct output
694861480

user output
694861480

Test 13

Group: 2

Verdict: ACCEPTED

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

correct output
555319110

user output
555319110

Test 14

Group: 2

Verdict: ACCEPTED

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

correct output
108372237

user output
108372237

Test 15

Group: 2

Verdict: ACCEPTED

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

correct output
259107857

user output
259107857

Test 16

Group: 2

Verdict: ACCEPTED

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

correct output
19906314

user output
19906314

Test 17

Group: 2

Verdict: ACCEPTED

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

correct output
224313667

user output
224313667

Test 18

Group: 2

Verdict: ACCEPTED

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

correct output
929574601

user output
929574601

Test 19

Group: 2

Verdict: ACCEPTED

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

correct output
600226043

user output
600226043

Test 20

Group: 2

Verdict: ACCEPTED

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

correct output
198353194

user output
198353194

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)