Buggy python submission (verdict: Time Limit Exceeded):
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
    for j in range(pos,n):
      if arr[j]-arr[i]>l:
        dbl[0][i+1]=j
        pos=j
        break
    else:
      dbl[0][i+1]=n
  for _ in range(n.bit_length()-1):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(mid.bit_length()):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Fixed submission:
import bisect
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
      dbl[0][i+1]=bisect.bisect_right(arr,arr[i]+l)
  for _ in range(n.bit_length()-1):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(mid.bit_length()):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input=sys.stdin.readline

def check(a,b,n):
  l=n.bit_length()
  for i in range(l):
    if n&(1<<i):
      a=dbl[i][a]
  return a>=b

n=int(input())
arr=list(map(int,input().split()))
l=int(input())
dbl=[[0]*(n+1)]
pos=0
for i in range(n):
  for j in range(pos,n):
    if arr[j]-arr[i]>l:
      dbl[0][i+1]=j
      pos=j
      break
  else:
    dbl[0][i+1]=n
for _ in range(n.bit_length()-1):
  tmp=[0]*(n+1)
  for i in range(n+1):
    tmp[i]=dbl[-1][dbl[-1][i]]
  dbl.append(tmp)
q=int(input())
for _ in range(q):
  a,b=map(int,input().split())
  if a>b:
    a,b=b,a
  l=0
  r=b-a+1
  while r-l!=1:
    mid=(l+r)//2
    if check(a,b,mid):
      r=mid
    else:
      l=mid
  print(r)

Fixed submission:
import bisect
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
      dbl[0][i+1]=bisect.bisect_right(arr,arr[i]+l)
  for _ in range(n.bit_length()-1):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(mid.bit_length()):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1) for _ in range(17)]
  for i in range(n):
    for j in range(pos,n):
      if arr[j]-arr[i]>l:
        dbl[0][i+1]=j
        pos=j
        break
    else:
      dbl[0][i+1]=n
  for i in range(1,17):
    for j in range(n+1):
      dbl[i][j]=dbl[i-1][dbl[i-1][j]]
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(17):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Fixed submission:
import bisect
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
      dbl[0][i+1]=bisect.bisect_right(arr,arr[i]+l)
  for _ in range(n.bit_length()-1):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(mid.bit_length()):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
    for j in range(pos,n):
      if arr[j]-arr[i]>l:
        dbl[0][i+1]=j
        pos=j
        break
    else:
      dbl[0][i+1]=n
  for _ in range(16):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(17):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Fixed submission:
import bisect
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
      dbl[0][i+1]=bisect.bisect_right(arr,arr[i]+l)
  for _ in range(n.bit_length()-1):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(mid.bit_length()):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()

Buggy python submission (verdict: Time Limit Exceeded):
n=int(input())
arr=list(map(int,input().split()))
l=int(input())
pos=0
dbl=[[0]*(n+1)]
for i in range(n):
  for j in range(pos,n):
    if arr[j]-arr[i]>l:
      dbl[0][i+1]=j
      pos=j
      break
  else:
    dbl[0][i+1]=n
for _ in range(20):
  tmp=[0]*(n+1)
  for i in range(n+1):
    tmp[i]=dbl[-1][dbl[-1][i]]
  dbl.append(tmp)
q=int(input())
for _ in range(q):
  a,b=map(int,input().split())
  if a>b:
    a,b=b,a
  l=0
  r=b-a+1
  while r-l!=1:
    mid=(l+r)//2
    tmp=a
    for i in range(20):
      if mid&(1<<i):
        tmp=dbl[i][tmp]
    if tmp>=b:
      r=mid
    else:
      l=mid
  print(r)

Fixed submission:
import bisect
import sys
input=sys.stdin.readline

def calc():
  n=int(input())
  arr=list(map(int,input().split()))
  l=int(input())
  pos=0
  dbl=[[0]*(n+1)]
  for i in range(n):
      dbl[0][i+1]=bisect.bisect_right(arr,arr[i]+l)
  for _ in range(n.bit_length()-1):
    tmp=[0]*(n+1)
    for i in range(n+1):
      tmp[i]=dbl[-1][dbl[-1][i]]
    dbl.append(tmp)
  q=int(input())
  for _ in range(q):
    a,b=map(int,input().split())
    if a>b:
      a,b=b,a
    l=0
    r=b-a+1
    while r-l!=1:
      mid=(l+r)//2
      tmp=a
      for i in range(mid.bit_length()):
        if mid&(1<<i):
          tmp=dbl[i][tmp]
      if tmp>=b:
        r=mid
      else:
        l=mid
    print(r)
calc()