結果

問題 No.3071 Double Speedrun
ユーザー lif4635
提出日時 2025-03-21 22:09:06
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 4,424 ms / 6,000 ms
コード長 3,033 bytes
コンパイル時間 430 ms
コンパイル使用メモリ 82,176 KB
実行使用メモリ 268,928 KB
最終ジャッジ日時 2025-03-21 22:09:41
合計ジャッジ時間 33,949 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge1
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ファイルパターン 結果
sample AC * 3
other AC * 14
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 # 

# input
import sys
# input = sys.stdin.readline
II = lambda : int(input())
MI = lambda : map(int, input().split())
LI = lambda : [int(a) for a in input().split()]
SI = lambda : input().rstrip()
LLI = lambda n : [[int(a) for a in input().split()] for _ in range(n)]
LSI = lambda n : [input().rstrip() for _ in range(n)]
MI_1 = lambda : map(lambda x:int(x)-1, input().split())
LI_1 = lambda : [int(a)-1 for a in input().split()]

def graph(n:int, m:int, dir:bool=False, index:int=-1) -> list[set[int]]:
    edge = [set() for i in range(n+1+index)]
    for _ in range(m):
        a,b = map(int, input().split())
        a += index
        b += index
        edge[a].add(b)
        if not dir:
            edge[b].add(a)
    return edge

def graph_w(n:int, m:int, dir:bool=False, index:int=-1) -> list[set[tuple]]:
    edge = [set() for i in range(n+1+index)]
    for _ in range(m):
        a,b,c = map(int, input().split())
        a += index
        b += index
        edge[a].add((b,c))
        if not dir:
            edge[b].add((a,c))
    return edge

mod = 998244353
inf = 1001001001001001001
ordalp = lambda s : ord(s)-65 if s.isupper() else ord(s)-97
ordallalp = lambda s : ord(s)-39 if s.isupper() else ord(s)-97
yes = lambda : print("Yes")
no = lambda : print("No")
yn = lambda flag : print("Yes" if flag else "No")
def acc(a:list[int]):
    sa = [0]*(len(a)+1)
    for i in range(len(a)):
        sa[i+1] = a[i] + sa[i]
    return sa

prinf = lambda ans : print(ans if ans < 1000001001001001001 else -1)
alplow = "abcdefghijklmnopqrstuvwxyz"
alpup = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
alpall = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
URDL = {'U':(-1,0), 'R':(0,1), 'D':(1,0), 'L':(0,-1)}
DIR_4 = [[-1,0],[0,1],[1,0],[0,-1]]
DIR_8 = [[-1,0],[-1,1],[0,1],[1,1],[1,0],[1,-1],[0,-1],[-1,-1]]
DIR_BISHOP = [[-1,1],[1,1],[1,-1],[-1,-1]]
prime60 = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59]
sys.set_int_max_str_digits(0)
sys.setrecursionlimit(10**6)
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')

from collections import defaultdict,deque
from heapq import heappop,heappush
from bisect import bisect_left,bisect_right
DD = defaultdict
BSL = bisect_left
BSR = bisect_right


h,w = MI()
s = LSI(h)
now = [[0]*h for i in range(h)]
now[0][1] = 1 # ここから開始
for d in range(1, h + w - 3):
    nxt = [[0]*h for i in range(h)]
    for px in range(h):
        for qx in range(h):
            if now[px][qx] == 0: continue
            py = d - px
            qy = d - qx
            
            for i in range(2):
                for j in range(2):
                    if px + i == qx + j: continue
                    nx,ny = px+i, py+1-i
                    mx,my = qx+j, qy+1-j
                    if not (nx < h and ny < w and mx < h and my < w):
                        continue
                    if s[nx][ny] == "#" or s[mx][my] == "#":
                        continue
                    nxt[nx][mx] += now[px][qx] % mod
    now = nxt
    # print(now)
ans = now[h-2][h-1]
print(ans % mod)
0