結果

問題 No.1750 ラムドスウイルスの感染拡大-hard
ユーザー mkawa2
提出日時 2021-11-19 22:50:40
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 1,819 ms / 2,000 ms
コード長 1,299 bytes
コンパイル時間 388 ms
コンパイル使用メモリ 82,328 KB
実行使用メモリ 86,400 KB
最終ジャッジ日時 2025-01-01 20:57:23
合計ジャッジ時間 21,268 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 30
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

import sys
# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
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 = 18446744073709551615
# inf = 4294967295
# 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
n, m, t = LI()
base = [[0]*n for _ in range(n)]
for _ in range(m):
u, v = LI()
base[u][v] = 1
base[v][u] = 1
mat = [[1 if i == j else 0 for j in range(n)] for i in range(n)]
while t:
if t & 1: mat = dot(mat, base)
base = dot(base, base)
t >>= 1
print(mat[0][0])
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