Buggy python submission (verdict: Runtime Error):
def mod3(n):
    b= n
    sho = []
    while b >= 1:
        a = int(b % 3)
        b = int((b - a)/3)
        sho.append(a)
    return sho

def cal_dis(ss,tt):
    s,t = mod3(ss),mod3(tt)
    c = 0
    if len(s) == len(t):
        n = len(s)
        k = 0
        b = 0
        flg =0
        for i in range(n):
            if s[i] == 1 and t[i] == 1:
                k = i+1
                b =2
                flg =1
                if i > 0:
                    c = int(3**(k-1)/2) +1
                    amari = ss % (3^k-1)
                    amari2 = tt%(3^k-1)
                    if amari > (3^k-1)/2:
                        amari = (3^k-1) -amari
                    if amari2 > (3^k-1)/2:
                        amari2 = (3^k-1) -amari2
                    b = amari+2 +amari2 
        if flg == 0:
            a = ss - tt if ss > tt else tt-ss
            return a
        else:
            return b

    else:
        return ss - tt if ss > tt else tt-ss

N = int(input())
dic ={}
for i in range(N):
    dic[i] = [int(a) for a in input().split(' ')]

for i in range(N):
    s = [dic[i][0]-1,dic[i][1]-1]
    t = [dic[i][2]-1,dic[i][3]-1]

    print(cal_dis(s[0],t[0]) + cal_dis(s[1], t[1]))

Fixed submission:
def solve(A,B,C,D, level):
    E = 3**level
    if level == -1:
        return int(abs(A-C) + abs(B-D))
    a,b,c,d = A//E, B//E, C//E, D//E
    if a != c and b != d:
        return int(abs(A-C) + abs(B-D))

    if a == c and b==d:
        return solve(A,B,C,D,level-1)

    if a != c and b==d:
        A,B,C,D = B,A,D,C
        a,b,c,d = b,a,d,c

    if b != d and a == c:
        if a%3 != 1:
            return solve(A,B,C,D,level-1)
        if abs(b-d) == 1:
            return solve(A,B,C,D,level-1)

        if B > D:
            A, B, C, D = C, D, A, B
            a, b, c, d = c, d, a, b

        x = E * a -1
        y1 = E * (b+1) -1
        y2 = E * d
        d = abs(x-A) + abs(y1-B) + abs(y1-y2) + abs(x-C) + abs(y2-D)
        x = E *(a+1)
        d2 = abs(x-A) + abs(y1-B) + abs(y1-y2) + abs(x-C) + abs(y2-D)
        return min(d,d2)

N = int(input())

for i in range(N):
    sg = [int(j.strip())  for j in input().split(' ')]
    s,g = [sg[0]-1,sg[1]-1],[sg[2]-1,sg[3]-1]
    A,B,C,D = s[0],s[1],g[0],g[1]
    print(solve(A,B,C,D,30))

Buggy python submission (verdict: Runtime Error):
def mod3(n):
    b= n
    sho = []
    while b >= 1:
        a = int(b % 3)
        b = int((b - a)/3)
        sho.append(a)
    return sho

def cal_dis(ss,tt):
    s,t = mod3(ss),mod3(tt)
    if len(s) == len(t):
        n = len(s)
        k = 0
        for i in range(n):
            if s[i] == 1 and t[i] == 1:
                k = i+1
                if i > 0:
                    b = abs(s[i-1] - t[i-1])
        a = ss - tt if ss > tt else tt-ss
        return a + 2*k - 2* b

    else:
        return ss - tt if ss > tt else tt-ss

N = int(input())
dic ={}
for i in range(N):
    dic[i] = [int(a) for a in input().split(' ')]

for i in range(N):
    s = [dic[i][0]-1,dic[i][1]-1]
    t = [dic[i][2]-1,dic[i][3]-1]


    print(cal_dis(s[0],t[0]) + cal_dis(s[1], t[1]))

Fixed submission:
def solve(A,B,C,D, level):
    E = 3**level
    if level == -1:
        return int(abs(A-C) + abs(B-D))
    a,b,c,d = A//E, B//E, C//E, D//E
    if a != c and b != d:
        return int(abs(A-C) + abs(B-D))

    if a == c and b==d:
        return solve(A,B,C,D,level-1)

    if a != c and b==d:
        A,B,C,D = B,A,D,C
        a,b,c,d = b,a,d,c

    if b != d and a == c:
        if a%3 != 1:
            return solve(A,B,C,D,level-1)
        if abs(b-d) == 1:
            return solve(A,B,C,D,level-1)

        if B > D:
            A, B, C, D = C, D, A, B
            a, b, c, d = c, d, a, b

        x = E * a -1
        y1 = E * (b+1) -1
        y2 = E * d
        d = abs(x-A) + abs(y1-B) + abs(y1-y2) + abs(x-C) + abs(y2-D)
        x = E *(a+1)
        d2 = abs(x-A) + abs(y1-B) + abs(y1-y2) + abs(x-C) + abs(y2-D)
        return min(d,d2)

N = int(input())

for i in range(N):
    sg = [int(j.strip())  for j in input().split(' ')]
    s,g = [sg[0]-1,sg[1]-1],[sg[2]-1,sg[3]-1]
    A,B,C,D = s[0],s[1],g[0],g[1]
    print(solve(A,B,C,D,30))