結果
問題 | No.1879 How many matchings? |
ユーザー | mkawa2 |
提出日時 | 2022-03-18 23:36:24 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 62 ms / 2,000 ms |
コード長 | 1,798 bytes |
コンパイル時間 | 268 ms |
コンパイル使用メモリ | 81,920 KB |
実行使用メモリ | 67,456 KB |
最終ジャッジ日時 | 2024-10-03 09:03:56 |
合計ジャッジ時間 | 1,764 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 46 ms
52,480 KB |
testcase_01 | AC | 43 ms
52,480 KB |
testcase_02 | AC | 50 ms
60,288 KB |
testcase_03 | AC | 42 ms
52,480 KB |
testcase_04 | AC | 51 ms
60,160 KB |
testcase_05 | AC | 42 ms
52,352 KB |
testcase_06 | AC | 51 ms
60,544 KB |
testcase_07 | AC | 47 ms
52,096 KB |
testcase_08 | AC | 52 ms
60,288 KB |
testcase_09 | AC | 44 ms
52,992 KB |
testcase_10 | AC | 62 ms
67,456 KB |
testcase_11 | AC | 62 ms
66,432 KB |
testcase_12 | AC | 62 ms
66,560 KB |
testcase_13 | AC | 44 ms
52,864 KB |
testcase_14 | AC | 62 ms
66,688 KB |
ソースコード
import sys # sys.setrecursionlimit(200005) int1 = lambda x: int(x)-1 pDB = lambda *x: print(*x, end="\n", file=sys.stderr) p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr) def II(): return int(sys.stdin.readline()) def LI(): return list(map(int, sys.stdin.readline().split())) def LLI(rows_number): return [LI() for _ in range(rows_number)] def LI1(): return list(map(int1, sys.stdin.readline().split())) def LLI1(rows_number): return [LI1() for _ in range(rows_number)] def SI(): return sys.stdin.readline().rstrip() dij = [(0, 1), (-1, 0), (0, -1), (1, 0)] # dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)] inf = (1 << 63)-1 # inf = (1 << 31)-1 md = 10**9+7 # md = 998244353 def dot(aa, bb): h = len(aa) w = len(bb[0]) res = [[0]*w for _ in range(h)] for i, row in enumerate(aa): for j, col in enumerate(zip(*bb)): v = 0 # for a, b in zip(row, col): v += a*b # res[i][j] = v%md for a, b in zip(row, col): v += a*b%md res[i][j] = v%md return res def matpow(mat, e): n = len(mat) res = [[1 if i == j else 0 for j in range(n)] for i in range(n)] while e: if e & 1: res = dot(res, mat) mat = dot(mat, mat) e >>= 1 return res n = II() if n & 1: mat = [[0, 0, 0, 1, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 1], [0, 1, 0, 1, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0, 0, 1], [0, 0, 0, 0, 0, 0, 0, 1], [0, 0, 0, 0, 1, 0, 0, 0], [0, 0, 0, 0, 0, 1, 0, 1], [0, 0, 0, 0, 0, 0, 1, 0]] mat = matpow(mat, n) ans = mat[3][7] # p2D(mat) else: mat = [[0, 1], [1, 1]] mat = matpow(mat, n//2) ans = (mat[0][0]+mat[1][0])%md print(ans)