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14500.py
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14500.py
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h, w = list(map(int, input().split()))
paper = []
temp_answer = 0
answer = 0
for _ in range(h):
paper.append(list(map(int, input().split())))
def check_paper(paper, i, j, h, w):
answer = 0
temp_answer = 0
if j + 4 <= w:
temp_answer = paper[i][j] + paper[i][j+1] + paper[i][j+2] + paper[i][j+3]
if answer < temp_answer:
answer = temp_answer
if i + 4 <= h:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i+2][j] + paper[i+3][j]
if answer < temp_answer:
answer = temp_answer
if i + 2 <= h and j + 2 <= w:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i][j+1] + paper[i+1][j+1]
if answer < temp_answer:
answer = temp_answer
if i + 3 <= h and j + 2 <= w:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i+2][j] + paper[i+2][j+1]
if answer < temp_answer:
answer = temp_answer
if i + 3 <= h and j + 2 <= w:
temp_answer = paper[i][j] + paper[i+1][j+1] + paper[i+2][j+1] + paper[i][j+1]
if answer < temp_answer:
answer = temp_answer
if i + 2 <= h and j + 3 <= w:
temp_answer = paper[i][j] + paper[i][j+1] + paper[i][j+2] + paper[i+1][j+2]
if answer < temp_answer:
answer = temp_answer
if i + 2 <= h and j + 3 <= w:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i+1][j+1] + paper[i+1][j+2]
if answer < temp_answer:
answer = temp_answer
if i + 3 <= h and j + 2 <= w:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i+1][j+1] + paper[i+2][j+1]
if answer < temp_answer:
answer = temp_answer
if i + 2 <= h and j + 3 <= w:
temp_answer = paper[i][j] + paper[i][j+1] + paper[i+1][j+1] + paper[i+1][j+2]
if answer < temp_answer:
answer = temp_answer
if 3 <= i + 2 <= h and j + 3 <= w:
temp_answer = paper[i][j] + paper[i][j+1] + paper[i-1][j+1] + paper[i-1][j+2]
if answer < temp_answer:
answer = temp_answer
if 4 <= i + 2 <= h and j + 2 <= w:
temp_answer = paper[i][j] + paper[i-1][j] + paper[i-1][j+1] + paper[i-2][j+1]
if answer < temp_answer:
answer = temp_answer
if i + 2 <= h and j + 3 <= w:
temp_answer = paper[i][j] + paper[i][j+1] + paper[i+1][j+1] + paper[i][j+2]
if answer < temp_answer:
answer = temp_answer
if i + 3 <= h and j + 2 <= w:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i+1][j+1] + paper[i+2][j]
if answer < temp_answer:
answer = temp_answer
if 3 <= i + 2 <= h and j + 3 <= w:
temp_answer = paper[i][j] + paper[i][j+1] + paper[i-1][j+1] + paper[i][j+2]
if answer < temp_answer:
answer = temp_answer
if i + 3 <= h and 3 <= j + 3 <= w:
temp_answer = paper[i][j] + paper[i+1][j] + paper[i+1][j-1] + paper[i+2][j]
if answer < temp_answer:
answer = temp_answer
return answer
for i in range(h):
for j in range(w):
temp_answer = check_paper(paper, i, j, h, w)
if answer < temp_answer:
answer = temp_answer
print(answer)