Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [[1, 0], [-1, 0], [0, 1], [0, -1]]
move2 = [
    [-2, -2], [-2, -1], [-2, 0], [-2, 1], [-2, 2], \
    [-1, -2], [-1, -1], [-1, 0], [-1, 1], [-1, 2], \
    [0, -2], [0, -1], [0, 0], [0, 1], [0, 2], \
    [1, -2], [1, -1], [1, 0], [1, 1], [1, 2], \
    [2, -2], [2, -1], [2, 0], [2, 1], [2, 2]
    ]
q = deque([[ch, cw]])
one_time = deque([])
while len(q) > 0:
    x, y = q.popleft()
    one_time.append([x, y])
    for i, j in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append([v1, v2])
    if len(q) == 0:
        while len(one_time) > 0:
            x2, y2 = one_time.popleft()
            for i, j in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append([v1, v2])
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [[1, 0], [-1, 0], [0, 1], [0, -1]]
move2 = [
    [-2, -2], [-2, -1], [-2, 0], [-2, 1], [-2, 2], \
    [-1, -2], [-1, -1], [-1, 0], [-1, 1], [-1, 2], \
    [0, -2], [0, -1], [0, 0], [0, 1], [0, 2], \
    [1, -2], [1, -1], [1, 0], [1, 1], [1, 2], \
    [2, -2], [2, -1], [2, 0], [2, 1], [2, 2]
    ]
q = deque([[ch, cw]])
one_time = deque([])
while q:
    x, y = q.popleft()
    one_time.append([x, y])
    for i, j in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append([v1, v2])
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for i, j in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append([v1, v2])
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [[1, 0], [-1, 0], [0, 1], [0, -1]]
move2 = [
    [-2, -2], [-2, -1], [-2, 0], [-2, 1], [-2, 2], \
    [-1, -2], [-1, -1], [-1, 0], [-1, 1], [-1, 2], \
    [0, -2], [0, -1], [0, 0], [0, 1], [0, 2], \
    [1, -2], [1, -1], [1, 0], [1, 1], [1, 2], \
    [2, -2], [2, -1], [2, 0], [2, 1], [2, 2]]
q = deque([[ch, cw]])
one_time = deque()
while q:
    x, y = q.popleft()
    one_time.append([x, y])
    for i, j in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append([v1, v2])
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for i, j in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append([v1, v2])
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [[1, 0], [-1, 0], [0, 1], [0, -1]]
move2 = [
    [-2, -2], [-2, -1], [-2, 0], [-2, 1], [-2, 2], \
    [-1, -2], [-1, -1], [-1, 0], [-1, 1], [-1, 2], \
    [0, -2], [0, -1], [0, 0], [0, 1], [0, 2], \
    [1, -2], [1, -1], [1, 0], [1, 1], [1, 2], \
    [2, -2], [2, -1], [2, 0], [2, 1], [2, 2]]
q = deque([ch, cw])
one_time = deque()
while q:
    x, y = q.popleft()
    one_time.append([x, y])
    for i, j in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append([v1, v2])
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for i, j in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append([v1, v2])
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [[1, 0], [-1, 0], [0, 1], [0, -1]]
move2 = [
    [-2, -2], [-2, -1], [-2, 0], [-2, 1], [-2, 2], \
    [-1, -2], [-1, -1], [-1, 0], [-1, 1], [-1, 2], \
    [0, -2], [0, -1], [0, 0], [0, 1], [0, 2], \
    [1, -2], [1, -1], [1, 0], [1, 1], [1, 2], \
    [2, -2], [2, -1], [2, 0], [2, 1], [2, 2]]
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append([x, y])
    for i, j in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append([v1, v2])
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for i, j in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append([v1, v2])
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [[1, 0], [-1, 0], [0, 1], [0, -1]]
move2 = [
    [-2, -2], [-2, -1], [-2, 0], [-2, 1], [-2, 2], \
    [-1, -2], [-1, -1], [-1, 0], [-1, 1], [-1, 2], \
    [0, -2], [0, -1], [0, 0], [0, 1], [0, 2], \
    [1, -2], [1, -1], [1, 0], [1, 1], [1, 2], \
    [2, -2], [2, -1], [2, 0], [2, 1], [2, 2]]
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append([x, y])
    for i, j in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append([v1, v2])
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for i, j in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append([v1, v2])
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):

import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = [
    (-2, -2), (-2, -1), (-2, 0), (-2, 1), (-2, 2), \
    (-1, -2), (-1, -1), (-1, 0), (-1, 1), (-1, 2), \
    (0, -2), (0, -1), (0, 0), (0, 1), (0, 2), \
    (1, -2), (1, -1), (1, 0), (1, 1), (1, 2), \
    (2, -2), (2, -1), (2, 0), (2, 1), (2, 2)]
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = [(-2, -2), (-2, -1), (-2, 0), (-2, 1), (-2, 2), (-1, -2), (-1, -1), (-1, 0), (-1, 1), (-1, 2), (0, -2), (0, -1), (0, 0), (0, 1), (0, 2), (1, -2), (1, -1), (1, 0), (1, 1), (1, 2), (2, -2), (2, -1), (2, 0), (2, 1), (2, 2)]
q = deque()
one_time = deque()
q.append([ch, cw])
while len(q) > 0:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while len(one_time) > 0:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1; cw+=1
dh+=1; dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = [(-2, -2), (-2, -1), (-2, 0), (-2, 1), (-2, 2), (-1, -2), (-1, -1), (-1, 0), (-1, 1), (-1, 2), (0, -2), (0, -1), (0, 0), (0, 1), (0, 2), (1, -2), (1, -1), (1, 0), (1, 1), (1, 2), (2, -2), (2, -1), (2, 0), (2, 1), (2, 2)]
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = ["#" *(w+4)]
base.append("#" * (w+4))
for n in range(h):
    base.append("##" + input() + "##")
base.append("#" * (w+4))
base.append("#" * (w+4))
ans = [[-1] * (w+4) for _ in range(h+4)]
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1
cw+=1
dh+=1
dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = []
for i in range(-2, 3):
    for j in range(-2, 3):
        move2.append((i, j))
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = []
base.append(["#" for _ in range(w+4)])
base.append(["#" for _ in range(w+4)])
for n in range(h):
    s = list(input())
    s.append("#")
    s.append("#")
    s.insert(0, "#")
    s.insert(0, "#")
    base.append(s)
base.append(["#" for _ in range(w+4)])
base.append(["#" for _ in range(w+4)])
base = np.array(base)
ans = np.full_like(base, -1, dtype = int)
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1
cw+=1
dh+=1
dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = []
for i in range(-2, 3):
    for j in range(-2, 3):
        move2.append((i, j))
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = []
base.append(["#" for _ in range(w+4)])
base.append(["#" for _ in range(w+4)])
for n in range(h):
    s = list(input())
    s.append("#")
    s.append("#")
    s.insert(0, "#")
    s.insert(0, "#")
    base.append(s)
base.append(["#" for _ in range(w+4)])
base.append(["#" for _ in range(w+4)])
base = np.array(base)
ans = np.full_like(base, -1, dtype = int)
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1
cw+=1
dh+=1
dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = []
for i in range(-2, 3):
    for j in range(-2, 3):
        move2.append((i, j))
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
from collections import deque

h, w = map(int, input().split())
ch, cw = map(int, input().split())
dh, dw = map(int, input().split())
base = []
base.append(["#" for _ in range(w+4)])
base.append(["#" for _ in range(w+4)])
for n in range(h):
    s = list(input())
    s.append("#")
    s.append("#")
    s.insert(0, "#")
    s.insert(0, "#")
    base.append(s)
base.append(["#" for _ in range(w+4)])
base.append(["#" for _ in range(w+4)])
base = np.array(base)
ans = np.full_like(base, -1, dtype = int)
for j in range(w+4):
    for i in range(h+4):
        if base[i][j] == "#":
            ans[i][j] = -2
ch+=1
cw+=1
dh+=1
dw+=1
ans[ch][cw] = 0
move = [(1, 0), (-1, 0), (0, 1), (0, -1)]
move2 = []
for i in range(-2, 3):
    for j in range(-2, 3):
        move2.append((i, j))
q = deque()
one_time = deque()
q.append([ch, cw])
while q:
    x, y = q.popleft()
    one_time.append((x, y))
    for (i, j) in move:
        v1, v2 = x+i, y+j
        if ans[v1][v2] == -1:
            ans[v1][v2] = ans[x][y]
            q.append((v1, v2))
    if len(q) == 0:
        while one_time:
            x2, y2 = one_time.popleft()
            for (i, j) in move2:
                v1, v2 = x2+i, y2+j
                if ans[v1][v2] == -1:
                    ans[v1][v2] = ans[x2][y2] + 1
                    q.append((v1, v2))
print(ans[dh][dw])

Fixed submission:
from collections import deque
 
 
# In[30]:
 
 
def main():
    H,W = map(int, input().split())
    ch,cw = map(int, input().split())
    dh,dw = map(int, input().split())
    s = ["#"*(W+4)]
    s.append("#"*(W+4))
    for i in range(H):
        s.append("##"+input()+"##")
    s.append("#"*(W+4))
    s.append("#"*(W+4))
    
    ans = [[-1]*(W+4) for _ in range(H+4)]
    for i in range(H+4):
        for j in range(W+4):
            if s[i][j] == "#":
                ans[i][j] = -2
    ch += 1; cw += 1
    dh += 1; dw += 1
    ans[ch][cw] = 0
    
    move = [[-1,0],[1,0],[0,-1],[0,1]]
    magic = [
        [-2,-2],[-2,-1],[-2,0],[-2,1],[-2,2],\
        [-1,-2],[-1,-1],[-1,0],[-1,1],[-1,2],\
        [0,-2],[0,-1],[0,0],[0,1],[0,2],\
        [1,-2],[1,-1],[1,0],[1,1],[1,2],\
        [2,-2],[2,-1],[2,0],[2,1],[2,2]
        ]
    
    mylist = deque([[ch,cw]])
    mylist2 = deque([])
    while len(mylist) > 0:
        x,y = mylist.popleft()
        mylist2.append([x,y])
        for p,q in move:
            v1,v2 = x+p,y+q
            if ans[v1][v2] == -1:
                mylist.append([v1,v2])
                ans[v1][v2] = ans[x][y]
        if len(mylist) == 0:
            while len(mylist2) > 0:
                x2,y2 = mylist2.popleft()
                for v1,v2 in magic:
                    i,j = x2+v1,y2+v2
                    if ans[i][j] == -1:
                        ans[i][j] = ans[x2][y2]+1
                        mylist.append([i,j])
    print(ans[dh][dw])
 
if __name__ == "__main__":
    main()