Submission #62062994

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h, w = map(int, input().split())
a = []
sx = -1
sy = -1
gx = -1
gy = -1
for i in range(h):
    a.append(input())
    for j in range(w):
        if a[i][j] == "#":
            if sx == -1:
                sx = i
                sy = j
            sx = min(sx, i)
            sy = min(sy, j)
            gx = max(gx, i)
            gy = max(gy, j)
# print(sx, sy, gx, gy)
for i in range(sx, gx + 1):
    for j in range(sy, gy + 1):
        if a[i][j] == ".":
 
 
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

h, w = map(int, input().split())
a = []
sx = -1
sy = -1
gx = -1
gy = -1
for i in range(h):
    a.append(input())
    for j in range(w):
        if a[i][j] == "#":
            if sx == -1:
                sx = i
                sy = j
            sx = min(sx, i)
            sy = min(sy, j)
            gx = max(gx, i)
            gy = max(gy, j)
# print(sx, sy, gx, gy)
for i in range(sx, gx + 1):
    for j in range(sy, gy + 1):
        if a[i][j] == ".":
            print("No")
            exit()
print("Yes")

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Judge Result