結果

問題 No.2509 Beam Shateki
ユーザー mkawa2mkawa2
提出日時 2023-10-20 22:00:43
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 1,389 ms / 2,000 ms
コード長 1,877 bytes
コンパイル時間 933 ms
コンパイル使用メモリ 82,452 KB
実行使用メモリ 87,980 KB
最終ジャッジ日時 2024-09-20 18:58:14
合計ジャッジ時間 47,025 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
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 * 3
other AC * 61
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)
# sys.set_int_max_str_digits(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-(-1 << 31)
# inf = -1-(-1 << 63)
# md = 10**9+7
md = 998244353
memo = {}
ijs = {}
def line(si, sj, di, dj):
if (si, sj, di, dj) in memo: return memo[si, sj, di, dj]
res = 0
i, j = si, sj
st = set()
while 0 <= i < h and 0 <= j < w:
st.add((i, j))
res += aa[i][j]
i, j = i+di, j+dj
memo[si, sj, di, dj] = res
ijs[si, sj, di, dj] = st
return res
def cross(i, j, di, dj, p, q, dp, dq):
s=ijs[i, j, di, dj]
t=ijs[p, q, dp, dq]
if len(s)>len(t):s,t=t,s
for a in s:
if a in t:return a
return -1,-1
def start():
for i in range(h):
yield i, 0, 0, 1
yield i, 0, -1, 1
yield i, 0, 1, 1
for j in range(w):
yield 0, j, 1, 0
yield 0, j, 1, 1
yield h-1, j, -1, 1
h, w = LI()
aa = LLI(h)
ans = 0
for i, j, di, dj in start():
for p, q, dp, dq in start():
if (i, j, di, dj) == (p, q, dp, dq): continue
cur = line(i, j, di, dj)+line(p, q, dp, dq)
ci, cj = cross(i, j, di, dj, p, q, dp, dq)
if ci != -1: cur -= aa[ci][cj]
if cur > ans: ans = cur
# print(ans, i, j, di, dj, p, q, dp, dq)
print(ans)
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