n = 3 : 1 n = 4 : 2 n = 5 : 9 n = 6 : 30 n = 7 : 106 n = 8 : 364 n = 9 : 1253 n = 10 : 4302 n = 11 : 14794 n = 12 : 50996 n = 13 : 176430 n = 14 : 613084 n = 15 : 2141120 n = 16 : 7518144 n = 17 : 26548513 n = 18 : 94293878 n = 19 : 336857590 n = 20 : 212059251 n = 21 : 379833146 n = 22 : 910099373 n = 23 : 93077906 n = 24 : 121897595 n = 25 : 408576993 n = 26 : 674016394 n = 27 : 392347125 n = 28 : 645114595 n = 29 : 497249380 n = 30 : 720559443 n = 31 : 45903958 n = 32 : 332927473 n = 33 : 791401852 n = 34 : 809783807 n = 35 : 402328421 n = 36 : 191122747 n = 37 : 204703354 n = 38 : 744422336 n = 39 : 990050622 n = 40 : 977681706 n = 41 : 763017613 n = 42 : 99836725 n = 43 : 556975496 n = 44 : 760276501 n = 45 : 98942614 n = 46 : 367743795 n = 47 : 574835618 n = 48 : 955693286 n = 49 : 985536261 n = 50 : 45051710
jinhan814 3년 전
아래처럼 n^2 풀이를 짠 뒤에 아래 블로그의 코드를 통해서 recurrence를 찾아서 풀려고 했는데 WA가 나옵니다. 혹시 n^2 풀이에 오류가 있는 건가요??
https://min-25.hatenablog.com/...
n^2 풀이를 통해서 얻은 초항은 아래와 같습니다..
n = 3 : 1
n = 4 : 2
n = 5 : 9
n = 6 : 30
n = 7 : 106
n = 8 : 364
n = 9 : 1253
n = 10 : 4302
n = 11 : 14794
n = 12 : 50996
n = 13 : 176430
n = 14 : 613084
n = 15 : 2141120
n = 16 : 7518144
n = 17 : 26548513
n = 18 : 94293878
n = 19 : 336857590
n = 20 : 212059251
n = 21 : 379833146
n = 22 : 910099373
n = 23 : 93077906
n = 24 : 121897595
n = 25 : 408576993
n = 26 : 674016394
n = 27 : 392347125
n = 28 : 645114595
n = 29 : 497249380
n = 30 : 720559443
n = 31 : 45903958
n = 32 : 332927473
n = 33 : 791401852
n = 34 : 809783807
n = 35 : 402328421
n = 36 : 191122747
n = 37 : 204703354
n = 38 : 744422336
n = 39 : 990050622
n = 40 : 977681706
n = 41 : 763017613
n = 42 : 99836725
n = 43 : 556975496
n = 44 : 760276501
n = 45 : 98942614
n = 46 : 367743795
n = 47 : 574835618
n = 48 : 955693286
n = 49 : 985536261
n = 50 : 45051710