Problem:
 Score : 400 points    Problem Statement Along a road running in an east-west direction, there are A shrines and B temples.
The i -th shrine from the west is located at a distance of s_i meters from the west end of the road, and the i -th temple from the west is located at a distance of t_i meters from the west end of the road.  Answer the following Q queries:   Query i ( 1 \leq i \leq Q ): If we start from a point at a distance of x_i meters from the west end of the road and freely travel along the road, what is the minimum distance that needs to be traveled in order to visit one shrine and one temple? (It is allowed to pass by more shrines and temples than required.)       Constraints  1 \leq A, B \leq 10^5  1 \leq Q \leq 10^5  1 \leq s_1 < s_2 < ... < s_A \leq 10^{10}  1 \leq t_1 < t_2 < ... < t_B \leq 10^{10}  1 \leq x_i \leq 10^{10}  s_1, ..., s_A, t_1, ..., t_B, x_1, ..., x_Q are all different.  All values in input are integers.         Input Input is given from Standard Input in the following format:  A  B  Q  s_1  :  s_A  t_1  :  t_B  x_1  :  x_Q       Output Print Q lines. The i -th line should contain the answer to the i -th query.        Sample Input 1 2 3 4
100
600
400
900
1000
150
2000
899
799      Sample Output 1 350
1400
301
399  There are two shrines and three temples. The shrines are located at distances of 100, 600 meters from the west end of the road, and the temples are located at distances of 400, 900, 1000 meters from the west end of the road.   Query 1 : If we start from a point at a distance of 150 meters from the west end of the road, the optimal move is first to walk 50 meters west to visit a shrine, then to walk 300 meters east to visit a temple.  Query 2 : If we start from a point at a distance of 2000 meters from the west end of the road, the optimal move is first to walk 1000 meters west to visit a temple, then to walk 400 meters west to visit a shrine. We will pass by another temple on the way, but it is fine.  Query 3 : If we start from a point at a distance of 899 meters from the west end of the road, the optimal move is first to walk 1 meter east to visit a temple, then to walk 300 meters west to visit a shrine.  Query 4 : If we start from a point at a distance of 799 meters from the west end of the road, the optimal move is first to walk 199 meters west to visit a shrine, then to walk 200 meters west to visit a temple.        Sample Input 2 1 1 3
1
10000000000
2
9999999999
5000000000      Sample Output 2 10000000000
10000000000
14999999998  The road is quite long, and we may need to travel a distance that does not fit into a 32 -bit integer.

Solution (Python):
class AvlTree:  
    def __init__(self, values=None, sorted_=False):
        if values is None:
            self.left = [-1]
            self.right = [-1]
            self.values = [-float("inf")]
            self.diff = [0]  
            self.size_l = [0]
        else:
            n = len(values)
            self.left = [-1] * (n+1)
            self.right = [-1] * (n+1)
            self.values = [-float("inf")] + values
            self.diff = [0] * (n+1)  
            self.size_l = [0] * (n+1)
            if not sorted_:
                values.sort()

            st = [[1, n+1, 0]]
            while len(st) > 0:
                l, r, idx_par = st.pop()  
                c = (l+r) >> 1
                if self.values[c] < self.values[idx_par]:
                    self.left[idx_par] = c
                else:
                    self.right[idx_par] = c
                siz = r - l
                if siz & -siz == siz and siz != 1:  
                    self.diff[c] = 1
                siz_l = c - l
                self.size_l[c] = siz_l
                if siz_l > 0:
                    st.append([l, c, c])
                    c1 = c + 1
                    if c1 < r:  
                        st.append([c1, r, c])

    
    
    
    
    
    

    def rotate_right(self, idx_par, lr):  
        idx = self.left[idx_par] if lr==0 else self.right[idx_par]
        idx_l = self.left[idx]
        assert idx_l != -1  

        
        self.size_l[idx] -= self.size_l[idx_l] + 1

        
        a = self.diff[idx]
        b = self.diff[idx_l]  
        if b >= 0:
            na = a - 1 - b
            if na >= 0:
                nb = b - 1
            else:
                nb = a - 2
        else:
            na = a - 1
            if na >= 0:
                nb = b - 1
            else:
                nb = a + b - 2
        self.diff[idx] = na
        self.diff[idx_l] = nb

        
        self.left[idx] = self.right[idx_l]
        self.right[idx_l] = idx
        if lr==0:
            self.left[idx_par] = idx_l
        else:
            self.right[idx_par] = idx_l

    def rotate_left(self, idx_par, lr):  
        idx = self.left[idx_par] if lr==0 else self.right[idx_par]
        idx_r = self.right[idx]
        assert idx_r != -1  

        
        self.size_l[idx_r] += self.size_l[idx] + 1

        
        a = self.diff[idx]
        b = self.diff[idx_r]  
        if b <= 0:
            na = a + 1 - b
            if na <= 0:
                nb = b + 1
            else:
                nb = a + 2
        else:
            na = a + 1
            if na <= 0:
                nb = b + 1
            else:
                nb = a + b + 2
        self.diff[idx] = na
        self.diff[idx_r] = nb

        
        self.right[idx] = self.left[idx_r]
        self.left[idx_r] = idx
        if lr == 0:
            self.left[idx_par] = idx_r
        else:
            self.right[idx_par] = idx_r

    def add(self, x):  
        idx = 0
        path = []
        path_left = []
        while idx != -1:
            path.append(idx)
            value = self.values[idx]
            if x == value:
                return  
            elif x < value:
                path_left.append(idx)
                idx = self.left[idx]
            else:
                idx = self.right[idx]

        if x < value:
            self.left[path[-1]] = len(self.values)
        else:
            self.right[path[-1]] = len(self.values)
        self.left.append(-1)
        self.right.append(-1)
        self.values.append(x)
        self.diff.append(0)
        self.size_l.append(0)

        for idx_ in path_left:
            self.size_l[idx_] += 1

        idx = path[-1]
        delta_diff = 1 if x < value else -1
        self.diff[idx] += delta_diff
        for idx_par in path[-2::-1]:
            diff = self.diff[idx]
            if diff == 0:
                return
            elif diff == 2:  
                idx_l = self.left[idx]  
                if self.diff[idx_l] == -1:  
                    self.rotate_left(idx, 0)
                self.rotate_right(idx_par, self.right[idx_par]==idx)
                return
            elif diff == -2:  
                idx_r = self.right[idx]  
                if self.diff[idx_r] == 1:  
                    self.rotate_right(idx, 1)
                self.rotate_left(idx_par, self.right[idx_par]==idx)
                return
            else:
                self.diff[idx_par] += 1 if self.left[idx_par]==idx else -1
            idx = idx_par

    def remove(self):  
        raise NotImplementedError

    def __contains__(self, x):  
        raise NotImplementedError

    def bisect_left(self, x):  
        idx = self.right[0]
        res = 0
        while idx != -1:
            value = self.values[idx]
            if value == x:
                return res + self.size_l[idx]
            elif value < x:
                res += self.size_l[idx] + 1
                idx = self.right[idx]
            else:
                idx = self.left[idx]
        return res

    def bisect_right(self):  
        raise NotImplementedError


from bisect import bisect_left
import sys
input = sys.stdin.readline
A, B, Q = map(int, input().split())

S = [int(input()) for _ in range(A)]
T = [int(input()) for _ in range(B)]
avl_S = AvlTree(S, True)
avl_T = AvlTree(T, True)

def f(x):
    if 0 <= x and A - 1 >= x:
        return True
    return False
def g(x):
    if 0 <= x and B - 1 >= x:
        return True
    return False

for i in range(Q):
    x = int(input())
    p = avl_S.bisect_left(x)
    m = avl_T.bisect_left(x)

    res = []
    if f(p) and g(m):
        res.append(max(T[m], S[p]) - x)
    if f(p) and g(m - 1):
        res.append(min(S[p] - x, x - T[m - 1]) + S[p] - T[m - 1])
    if f(p - 1) and g(m):
        res.append(T[m] - S[p - 1] + min(T[m] - x, x - S[p - 1]))
    if f(p - 1) and g(m - 1):
        res.append(x - min(T[m - 1], S[p - 1]))
    print(min(res))

Solution (Python):
class AvlTree:  
    def __init__(self, values=None, sorted_=False):
        if values is None:
            self.left = [-1]
            self.right = [-1]
            self.values = [-float("inf")]
            self.diff = [0]  
            self.size_l = [0]
        else:
            n = len(values)
            self.left = [-1] * (n+1)
            self.right = [-1] * (n+1)
            self.values = [-float("inf")] + values
            self.diff = [0] * (n+1)  
            self.size_l = [0] * (n+1)
            if not sorted_:
                values.sort()

            st = [[1, n+1, 0]]
            while len(st) > 0:
                l, r, idx_par = st.pop()  
                c = (l+r) >> 1
                if self.values[c] < self.values[idx_par]:
                    self.left[idx_par] = c
                else:
                    self.right[idx_par] = c
                siz = r - l
                if siz & -siz == siz and siz != 1:  
                    self.diff[c] = 1
                siz_l = c - l
                self.size_l[c] = siz_l
                if siz_l > 0:
                    st.append([l, c, c])
                    c1 = c + 1
                    if c1 < r:  
                        st.append([c1, r, c])

    
    
    
    
    
    

    def rotate_right(self, idx_par, lr):  
        idx = self.left[idx_par] if lr==0 else self.right[idx_par]
        idx_l = self.left[idx]
        assert idx_l != -1  

        
        self.size_l[idx] -= self.size_l[idx_l] + 1

        
        a = self.diff[idx]
        b = self.diff[idx_l]  
        if b >= 0:
            na = a - 1 - b
            if na >= 0:
                nb = b - 1
            else:
                nb = a - 2
        else:
            na = a - 1
            if na >= 0:
                nb = b - 1
            else:
                nb = a + b - 2
        self.diff[idx] = na
        self.diff[idx_l] = nb

        
        self.left[idx] = self.right[idx_l]
        self.right[idx_l] = idx
        if lr==0:
            self.left[idx_par] = idx_l
        else:
            self.right[idx_par] = idx_l

    def rotate_left(self, idx_par, lr):  
        idx = self.left[idx_par] if lr==0 else self.right[idx_par]
        idx_r = self.right[idx]
        assert idx_r != -1  

        
        self.size_l[idx_r] += self.size_l[idx] + 1

        
        a = self.diff[idx]
        b = self.diff[idx_r]  
        if b <= 0:
            na = a + 1 - b
            if na <= 0:
                nb = b + 1
            else:
                nb = a + 2
        else:
            na = a + 1
            if na <= 0:
                nb = b + 1
            else:
                nb = a + b + 2
        self.diff[idx] = na
        self.diff[idx_r] = nb

        
        self.right[idx] = self.left[idx_r]
        self.left[idx_r] = idx
        if lr == 0:
            self.left[idx_par] = idx_r
        else:
            self.right[idx_par] = idx_r

    def add(self, x):  
        idx = 0
        path = []
        path_left = []
        while idx != -1:
            path.append(idx)
            value = self.values[idx]
            if x == value:
                return  
            elif x < value:
                path_left.append(idx)
                idx = self.left[idx]
            else:
                idx = self.right[idx]

        if x < value:
            self.left[path[-1]] = len(self.values)
        else:
            self.right[path[-1]] = len(self.values)
        self.left.append(-1)
        self.right.append(-1)
        self.values.append(x)
        self.diff.append(0)
        self.size_l.append(0)

        for idx_ in path_left:
            self.size_l[idx_] += 1

        idx = path[-1]
        delta_diff = 1 if x < value else -1
        self.diff[idx] += delta_diff
        for idx, idx_par in zip(path[:0:-1], path[-2::-1]):
            diff = self.diff[idx]
            if diff == 0:
                return
            elif diff == 2:  
                idx_l = self.left[idx]  
                if self.diff[idx_l] == -1:  
                    self.rotate_left(idx, 0)
                self.rotate_right(idx_par, self.right[idx_par]==idx)
                return
            elif diff == -2:  
                idx_r = self.right[idx]  
                if self.diff[idx_r] == 1:  
                    self.rotate_right(idx, 1)
                self.rotate_left(idx_par, self.right[idx_par]==idx)
                return
            else:
                self.diff[idx_par] += 1 if self.left[idx_par]==idx else -1

    def remove(self):  
        raise NotImplementedError

    def __contains__(self, x):  
        raise NotImplementedError

    def bisect_left(self, x):  
        idx = self.right[0]
        res = 0
        while idx != -1:
            value = self.values[idx]
            if value == x:
                return res + self.size_l[idx]
            elif value < x:
                res += self.size_l[idx] + 1
                idx = self.right[idx]
            else:
                idx = self.left[idx]
        return res

    def bisect_right(self):  
        raise NotImplementedError


from bisect import bisect_left
import sys
input = sys.stdin.readline
A, B, Q = map(int, input().split())

S = [int(input()) for _ in range(A)]
T = [int(input()) for _ in range(B)]
avl_S = AvlTree(S, True)
avl_T = AvlTree(T, True)

def f(x):
    if 0 <= x and A - 1 >= x:
        return True
    return False
def g(x):
    if 0 <= x and B - 1 >= x:
        return True
    return False

for i in range(Q):
    x = int(input())
    p = avl_S.bisect_left(x)
    m = avl_T.bisect_left(x)

    res = []
    if f(p) and g(m):
        res.append(max(T[m], S[p]) - x)
    if f(p) and g(m - 1):
        res.append(min(S[p] - x, x - T[m - 1]) + S[p] - T[m - 1])
    if f(p - 1) and g(m):
        res.append(T[m] - S[p - 1] + min(T[m] - x, x - S[p - 1]))
    if f(p - 1) and g(m - 1):
        res.append(x - min(T[m - 1], S[p - 1]))
    print(min(res))

Solution (Python):

class AvlTree:  
    def __init__(self, values=None):
        self.left = [-1]
        self.right = [-1]
        self.values = [-float("inf")]
        self.diff = [0]  
        self.size_l = [0]
        if values is not None:
            for v in values:
                self.add(v)

    
    
    
    
    
    

    def rotate_right(self, idx_par, lr):  
        idx = self.left[idx_par] if lr==0 else self.right[idx_par]
        idx_l = self.left[idx]
        assert idx_l != -1  

        
        self.size_l[idx] -= self.size_l[idx_l] + 1

        
        a = self.diff[idx]
        b = self.diff[idx_l]  
        if b >= 0:
            na = a - 1 - b
            if na >= 0:
                nb = b - 1
            else:
                nb = a - 2
        else:
            na = a - 1
            if na >= 0:
                nb = b - 1
            else:
                nb = a + b - 2
        self.diff[idx] = na
        self.diff[idx_l] = nb

        
        self.left[idx] = self.right[idx_l]
        self.right[idx_l] = idx
        if lr==0:
            self.left[idx_par] = idx_l
        else:
            self.right[idx_par] = idx_l

    def rotate_left(self, idx_par, lr):  
        idx = self.left[idx_par] if lr==0 else self.right[idx_par]
        idx_r = self.right[idx]
        assert idx_r != -1  

        
        self.size_l[idx_r] += self.size_l[idx] + 1

        
        a = self.diff[idx]
        b = self.diff[idx_r]  
        if b <= 0:
            na = a + 1 - b
            if na <= 0:
                nb = b + 1
            else:
                nb = a + 2
        else:
            na = a + 1
            if na <= 0:
                nb = b + 1
            else:
                nb = a + b + 2
        self.diff[idx] = na
        self.diff[idx_r] = nb

        
        self.right[idx] = self.left[idx_r]
        self.left[idx_r] = idx
        if lr == 0:
            self.left[idx_par] = idx_r
        else:
            self.right[idx_par] = idx_r

    def add(self, x):  
        idx = 0
        path = []
        path_left = []
        while idx != -1:
            path.append(idx)
            value = self.values[idx]
            if x == value:
                return  
            elif x < value:
                path_left.append(idx)
                idx = self.left[idx]
            else:
                idx = self.right[idx]

        if x < value:
            self.left[path[-1]] = len(self.values)
        else:
            self.right[path[-1]] = len(self.values)
        self.left.append(-1)
        self.right.append(-1)
        self.values.append(x)
        self.diff.append(0)
        self.size_l.append(0)

        for idx_ in path_left:
            self.size_l[idx_] += 1

        idx = path[-1]
        delta_diff = 1 if x < value else -1
        self.diff[idx] += delta_diff
        for idx, idx_par in zip(path[:0:-1], path[-2::-1]):
            diff = self.diff[idx]
            if diff == 0:
                return
            elif diff == 2:  
                idx_l = self.left[idx]  
                if self.diff[idx_l] == -1:  
                    self.rotate_left(idx, 0)
                self.rotate_right(idx_par, self.right[idx_par]==idx)
                return
            elif diff == -2:  
                idx_r = self.right[idx]  
                if self.diff[idx_r] == 1:  
                    self.rotate_right(idx, 1)
                self.rotate_left(idx_par, self.right[idx_par]==idx)
                return
            else:
                self.diff[idx_par] += 1 if self.left[idx_par]==idx else -1

    def remove(self):  
        raise NotImplementedError

    def __contains__(self, x):  
        raise NotImplementedError

    def bisect_left(self, x):  
        idx = self.right[0]
        res = 0
        while idx != -1:
            value = self.values[idx]
            if value == x:
                return res + self.size_l[idx]
            elif value < x:
                res += self.size_l[idx] + 1
                idx = self.right[idx]
            else:
                idx = self.left[idx]
        return res

    def bisect_right(self):  
        raise NotImplementedError


from bisect import bisect_left
import sys
input = sys.stdin.readline
A, B, Q = map(int, input().split())

S = [int(input()) for _ in range(A)]
T = [int(input()) for _ in range(B)]
avl_S = AvlTree(S)
avl_T = AvlTree(T)

def f(x):
    if 0 <= x and A - 1 >= x:
        return True
    return False
def g(x):
    if 0 <= x and B - 1 >= x:
        return True
    return False

for i in range(Q):
    x = int(input())
    p = avl_S.bisect_left(x)
    m = avl_T.bisect_left(x)

    res = []
    if f(p) and g(m):
        res.append(max(T[m], S[p]) - x)
    if f(p) and g(m - 1):
        res.append(min(S[p] - x, x - T[m - 1]) + S[p] - T[m - 1])
    if f(p - 1) and g(m):
        res.append(T[m] - S[p - 1] + min(T[m] - x, x - S[p - 1]))
    if f(p - 1) and g(m - 1):
        res.append(x - min(T[m - 1], S[p - 1]))
    print(min(res))

Solution (Python):
import bisect
A, B, Q = map(int, input().split())
INF = 10**18
S = [-INF] + [int(input()) for i in range(A)] + [INF]
T = [-INF] + [int(input()) for i in range(B)] + [INF]
for q in range(Q):
  x = int(input())
  b = bisect.bisect_right(S, x)
  d = bisect.bisect_right(T, x)
  res = INF
  
  for s in [S[b-1], S[b]]:
    for t in [T[d-1], T[d]]:
      d1 = abs(s-x) + abs(t-s)
      d2 = abs(t-x) + abs(s-t)
      res = min(res, d1, d2)
  print(res)

Solution (Python):
import sys
from bisect import bisect as br
A, B, Q = map(int, input().split())
inf = 10**11
S = [-inf] + [int(sys.stdin.readline()) for _ in range(A)] + [inf]
T = [-inf] + [int(sys.stdin.readline()) for _ in range(B)] + [inf]
X = [int(sys.stdin.readline()) for _ in range(Q)]

StoT = [0]*A
for i, s in enumerate(S[1:-1]):
    x = br(T, s)
    StoT[i] = (s, min(s - T[x-1], T[x] - s))

TtoS = [0]*B
for i, t in enumerate(T[1:-1]):
    x = br(S, t)
    TtoS[i] = (t, min(t - S[x-1], S[x] - t))

M = [(-inf, inf)] + TtoS + StoT + [(inf, inf)]
M.sort()
Mk , Mv = list(map(list, zip(*M)))
for x in X:
    idx = br(Mk, x)
    print(min(Mk[idx] - x + Mv[idx], x - Mk[idx-1] + Mv[idx-1]))

Solution (Python):
import sys, bisect
input = sys.stdin.readline
A, B, Q = map(int, input().split())
s = [int(input()) for _ in range(A)]
t = [int(input()) for _ in range(B)]
x = [int(input()) for _ in range(Q)]
inf = 10 ** 18

s = [-inf] + s + [inf]
t = [-inf] + t + [inf]

ans_Q = [None] * Q
i_last = j_last = 0
for idx, x_tmp in sorted(enumerate(x), key=lambda x: x[1]):
    i_l = max(0, bisect.bisect_left(s, x_tmp, lo=i_last) - 1)
    j_l = max(0, bisect.bisect_left(t, x_tmp, lo=j_last) - 1)
    
    
    ans = inf
    for i, j in ((i_l, j_l), (i_l + 1, j_l), (i_l, j_l + 1), (i_l + 1, j_l + 1)):
        if i < 1 or A < i: continue
        if j < 1 or B < j: continue
        ans_tmp_s = abs(x_tmp - s[i]) + abs(s[i] - t[j])
        ans_tmp_t = abs(x_tmp - t[j]) + abs(s[i] - t[j])
        ans_tmp = min(ans_tmp_s, ans_tmp_t)
        
        if ans > ans_tmp:
            ans = ans_tmp
    
    i_last, j_last = i_l, j_l
    ans_Q[idx] = ans

for ansi in ans_Q: print(ansi)