Pyth, 29 28 바이트
M/*FPJm*F.!MhMrd8aFCB,SGSHeJ
Pyth Compiler 에서 온라인으로 사용해보십시오 .
연산
결과는 A 의 순서에 의존하지 않으므로 정렬 된 것으로 가정 할 수 있습니다. 이것은 B를 의미 , 최대 내적을 얻기 위해 도 정렬해야합니다.
이제, 만약 R 1 , ..., R , N 의 주행면의 길이가 분류되어 을 가, Πr의 K ! A 의 요소의 다른 재배치여전히 오름차순으로 나타나는 .
마찬가지로, 만약 s의 (1) , S ... N 정렬의 런 길이이다 B 있다 Πs의 K ! 여전히 오름차순으로 나타나는 B 요소의 다른 재 배열 .
그러나 이것은 모든 페어링을 여러 번 계산합니다. 우리는 정렬의 대응하는 요소의 쌍 맡으면 을 하고 정렬 B를 정의를 t 1 , t ... N을 생성 어레이의 런 길이 Πt의 K ! 위에서 언급 한 승수입니다.
따라서 원하는 결과는 (∏r k !) × (∏s k !) ÷ (∏t k !) 입니다.
암호
M/*FPJm*F.!MhMrd8aFCB,SGSHeJ
M Define g(G,H):
SGSH Sort G and H.
, For the pair of the results.
CB Bifurcated zip (C).
This returns [[SG, SH], zip([SG, SH])].
aF Reduce by appending.
This returns [SG, SH, zip([SG, SH])].
m Map; for each d in the resulting array:
rd8 Perform run-length encoding on d.
hM Mapped "head". This returns the lengths.
.!M Mapped factorial.
*F Reduce by multiplication.
J Save the result in J.
P Discard the last element.
*F Reduce by multiplication.
/
eJ Divide the product by the last element of J.
Return the result of the division.
확인
위의 코드 와이 무차별 대입 방식으로 해결 한 길이 6의 100 가지 테스트 사례를 의사 무작위로 생성했습니다.
Ml.Ms*VGZ.pH
M Define g(G,H) (or n(G,H) on second use):
.pH Compute all permutations of H.
.M Filter .pH on the maximal value of the following;
for each Z in .pH:
*VGZ Compute the vectorized product of G and Z.
s Add the products.
This computes the dot product of G and Z.
l Return the length of the resulting array.
결과는 다음과 같습니다.
$ cat test.in
6,9,4,6,8,4,5,6,5,0,8,2
0,7,7,6,1,6,1,7,3,3,8,0
3,6,0,0,6,3,8,2,8,3,1,1
2,3,0,4,0,6,3,4,5,8,2,4
9,1,1,2,2,8,8,1,7,4,9,8
8,3,1,1,9,0,2,8,3,4,9,5
2,0,0,7,7,8,9,2,0,6,7,7
0,7,4,2,2,8,6,5,0,5,4,9
2,7,7,5,5,6,8,8,0,5,6,3
1,7,2,7,7,9,9,2,9,2,9,8
7,2,8,9,9,0,7,4,6,2,5,3
0,1,9,2,9,2,9,5,7,4,5,6
8,4,2,8,8,8,9,2,5,4,6,7
5,2,8,1,9,7,4,4,3,3,0,0
9,3,6,2,5,5,2,4,6,8,9,3
4,2,0,6,2,3,5,3,6,3,1,4
4,8,5,2,5,0,5,1,2,5,9,5
6,8,4,4,9,5,9,5,4,2,8,7
8,9,8,1,2,2,9,0,5,6,4,9
4,7,6,8,0,3,7,7,3,9,8,6
7,5,5,6,3,9,3,8,8,4,8,0
3,8,1,8,5,6,6,7,2,8,5,3
0,9,8,0,8,3,0,3,5,9,5,6
4,2,7,7,5,8,4,2,6,4,9,4
3,5,0,8,2,5,8,7,3,4,5,5
7,7,7,0,8,0,9,8,1,4,8,6
3,9,7,7,4,9,2,5,9,7,9,4
4,5,5,5,0,7,3,4,0,1,8,2
7,4,4,2,5,1,7,4,7,1,9,1
0,6,2,5,4,5,1,8,0,8,9,9
3,8,5,3,2,1,1,2,2,2,8,4
6,1,9,1,8,7,5,6,9,2,8,8
6,2,6,6,6,0,2,7,8,6,8,2
0,7,1,4,5,5,3,4,4,0,0,2
6,0,1,5,5,4,8,5,5,2,1,6
2,6,3,0,7,4,3,6,0,5,4,9
1,4,8,0,5,1,3,2,9,2,6,5
2,7,9,9,5,0,1,5,6,8,4,6
4,0,1,3,4,3,6,9,1,2,7,1
6,5,4,7,8,8,6,2,3,4,1,2
0,3,6,3,4,0,1,4,5,5,5,7
5,4,7,0,1,3,3,0,2,1,0,8
8,6,6,1,6,6,2,2,8,3,2,2
7,1,3,9,7,4,6,6,3,1,5,8
4,8,3,3,9,1,3,4,1,3,0,6
1,4,0,7,4,9,8,4,2,1,0,3
0,4,1,6,4,4,4,7,5,1,4,2
0,0,4,4,9,6,7,2,7,7,5,4
9,0,5,5,0,8,8,9,5,9,5,5
5,7,0,4,2,7,6,1,1,1,9,1
3,1,7,5,0,3,1,4,0,9,0,3
4,4,5,7,9,5,0,3,7,4,7,5
7,9,7,3,0,8,4,0,0,3,1,0
2,4,4,3,1,2,5,2,9,0,8,5
4,8,7,3,0,0,9,3,7,3,0,6
8,9,1,0,7,7,6,0,3,1,8,9
8,3,1,7,3,3,6,1,1,7,6,5
6,5,6,3,3,0,0,5,5,0,6,7
2,4,3,9,7,6,7,6,5,6,2,0
4,8,5,1,8,4,4,3,4,5,2,5
7,5,0,4,6,9,5,0,5,7,5,5
4,8,9,5,5,2,3,1,9,7,7,4
1,5,3,0,3,7,3,8,5,5,3,3
7,7,2,6,1,6,6,1,3,5,4,9
9,7,6,0,1,4,0,4,4,1,4,0
3,5,1,4,4,0,7,1,8,9,9,1
1,9,8,7,4,9,5,2,2,1,2,9
8,1,2,2,7,7,6,8,2,3,9,7
3,5,2,1,3,5,2,2,4,7,0,7
9,6,8,8,3,5,2,9,8,7,4,7
8,8,4,5,5,1,5,6,5,1,3,3
2,6,3,5,0,5,0,3,4,4,0,5
2,2,7,6,3,7,1,4,0,3,8,3
4,8,4,2,6,8,5,6,2,5,0,1
7,2,4,3,8,4,4,6,5,3,9,4
4,6,1,0,6,0,2,6,7,4,9,5
6,3,3,4,6,1,0,8,6,1,7,5
8,3,4,2,8,3,0,1,8,9,1,5
9,6,1,9,1,1,8,8,8,9,1,4
3,6,1,6,1,4,5,1,0,1,9,1
6,4,3,9,3,0,5,0,5,3,2,4
5,2,4,6,1,2,6,0,1,8,4,0
3,5,7,6,3,6,4,5,2,8,1,5
6,3,6,8,4,2,7,1,5,3,0,6
9,1,5,9,9,1,1,4,5,7,3,0
1,6,7,3,5,8,6,5,5,2,6,0
2,8,8,6,5,5,2,3,8,1,9,8
0,4,5,3,7,6,2,5,4,3,2,5
5,1,2,3,0,3,4,9,4,9,4,9
5,8,2,2,0,2,4,1,1,7,0,3
0,6,0,0,3,6,3,6,2,2,2,9
2,4,8,1,9,4,0,8,8,0,4,7
3,9,1,0,5,6,8,8,2,5,2,6
5,3,8,9,1,6,5,9,7,7,6,1
8,6,9,6,1,1,6,7,7,3,2,2
7,2,1,9,8,8,5,3,6,3,3,6
9,9,4,8,7,9,8,6,6,0,3,1
8,3,0,9,1,7,4,8,0,1,6,2
8,2,6,2,4,0,2,8,9,6,3,7
1,0,8,5,3,2,3,7,1,7,8,2
$ while read; do
> pyth -c 'M/*FPJm*F.!MhMrd8aFCB,SGSHeJMl.Ms*VGZ.pHAc2Q,gGHnGH' <<< "$REPLY"
> done < test.in
[4, 4]
[4, 4]
[8, 8]
[4, 4]
[8, 8]
[2, 2]
[4, 4]
[4, 4]
[4, 4]
[36, 36]
[2, 2]
[8, 8]
[24, 24]
[8, 8]
[2, 2]
[2, 2]
[6, 6]
[2, 2]
[8, 8]
[2, 2]
[12, 12]
[2, 2]
[8, 8]
[12, 12]
[4, 4]
[12, 12]
[4, 4]
[6, 6]
[8, 8]
[8, 8]
[6, 6]
[4, 4]
[48, 48]
[8, 8]
[4, 4]
[1, 1]
[4, 4]
[4, 4]
[8, 8]
[4, 4]
[12, 12]
[2, 2]
[96, 96]
[2, 2]
[4, 4]
[2, 2]
[6, 6]
[24, 24]
[24, 24]
[48, 48]
[4, 4]
[8, 8]
[12, 12]
[8, 8]
[4, 4]
[2, 2]
[24, 24]
[16, 16]
[2, 2]
[8, 8]
[24, 24]
[4, 4]
[24, 24]
[4, 4]
[12, 12]
[8, 8]
[12, 12]
[4, 4]
[8, 8]
[4, 4]
[16, 16]
[4, 4]
[8, 8]
[8, 8]
[4, 4]
[4, 4]
[4, 4]
[4, 4]
[72, 72]
[24, 24]
[4, 4]
[4, 4]
[4, 4]
[2, 2]
[12, 12]
[4, 4]
[8, 8]
[4, 4]
[36, 36]
[6, 6]
[12, 12]
[8, 8]
[4, 4]
[2, 2]
[8, 8]
[24, 24]
[6, 6]
[1, 1]
[2, 2]
[2, 2]
제출물이 속도 요구 사항을 충족하는지 확인하기 위해이 테스트 사례로 실행했습니다 .
$ time pyth -c 'M/*FPJm*F.!MhMrd8aFCB,SGSHeJAc2QgGH' < test-large.in | md5sum
5801bbf8ed0f4e43284f7ec2206fd3ff -
real 0m0.233s
user 0m0.215s
sys 0m0.019s