Buggy python submission (verdict: Time Limit Exceeded):
# C
import numpy as np
from bisect import bisect

x1, y1, x2, y2 = map(int, input().split())
N = int(input())

xL = min(x1, x2)
xR = max(x1, x2)
yL = min(y1, y2)
yR = max(y1, y2)

xv = np.zeros(N, dtype='int')
yv = np.zeros(N, dtype='int')

ind = 0
for _ in range(N):
    x, y = map(int, input().split())
    if xL <= x and x <= xR and yL <= y and y <= yR:
        xv[ind] = x
        yv[ind] = y
        ind += 1

xv = xv[:ind]
yv = yv[:ind]

N = ind



if x1 < x2 and y1 > y2:
    direction = 'rightdown'
elif x1 > x2 and y1 < y2:
    direction = 'rightdown'
else:
    direction = 'rightup'

    
# sort
if direction == 'rightup':
    xv_s = np.argsort(xv)
else:
    xv_s = np.argsort(-xv)

# calculate
dp = [yR+1]*(ind)
for i in range(ind):
    y = yv[xv_s[i]]
    dp[bisect(dp,y)] = y
count_ = bisect(dp,yR)

diff = 5*np.pi - 20
diff2 = 10*np.pi - 20
if count_ == min((xR-xL), (yR-yL)) + 1:
    print(100*((xR-xL) + (yR-yL)) + (count_-1)*diff + diff2)
else:
    print(100*((xR-xL) + (yR-yL)) + count_*diff)

Fixed submission:
# C
from bisect import bisect
import math
x1, y1, x2, y2 = map(int, input().split())
N = int(input())

xL = min(x1, x2)
xR = max(x1, x2)
yL = min(y1, y2)
yR = max(y1, y2)

xyl = []

if x1 < x2 and y1 > y2:
    direction = 'rightdown'
elif x1 > x2 and y1 < y2:
    direction = 'rightdown'
else:
    direction = 'rightup'
    
    
# sort
if direction == 'rightup':
    for _ in range(N):
        x, y = map(int, input().split())
        if xL <= x and x <= xR and yL <= y and y <= yR:
            xyl.append((x, y-yL))
else:
    for _ in range(N):
        x, y = map(int, input().split())
        if xL <= x and x <= xR and yL <= y and y <= yR:
            xyl.append((x, yR-y))

ind = len(xyl)
xyl.sort()

# calculate
dp = [yR-yL+1]*(ind)
for i in range(ind):
    _, y = xyl[i]
    dp[bisect(dp,y)] = y
count_ = bisect(dp,yR-yL)

diff = 5*math.pi - 20
diff2 = 10*math.pi - 20
if count_ == min((xR-xL), (yR-yL)) + 1:
    print(100*((xR-xL) + (yR-yL)) + (count_-1)*diff + diff2)
else:
    print(100*((xR-xL) + (yR-yL)) + count_*diff)

Buggy python submission (verdict: Time Limit Exceeded):
# C
import numpy as np
from bisect import bisect

x1, y1, x2, y2 = map(int, input().split())
N = int(input())

xL = min(x1, x2)
xR = max(x1, x2)
yL = min(y1, y2)
yR = max(y1, y2)

xv = np.zeros(N, dtype='int')
yv = np.zeros(N, dtype='int')

ind = 0
for _ in range(N):
    x, y = map(int, input().split())
    if xL <= x and x <= xR and yL <= y and y <= yR:
        xv[ind] = x
        yv[ind] = y
        ind += 1

xv = xv[:ind]
yv = yv[:ind]

N = ind



if x1 < x2 and y1 > y2:
    direction = 'upper'
elif x1 > x2 and y1 < y2:
    direction = 'upper'
else:
    direction = 'down'

    
# sort
xv_s = np.argsort(xv)
yv_ = yv[xv_s]

if direction == 'upper':
    yv_s_ = np.argsort(-yv_)
else:
    yv_s_ = np.argsort(yv_)

yv_s = np.zeros(ind, dtype='int')
for i in range(ind):
    yv_s[yv_s_[i]] = i


# calculate
dp = [ind+1]*(ind)
for i in range(ind):
    y = yv_s[i]
    dp[bisect(dp,y)] = y
count_ = bisect(dp,ind)

diff = 5*np.pi - 20
diff2 = 10*np.pi - 20
if count_ == min((xR-xL), (yR-yL)) + 1:
    print(100*((xR-xL) + (yR-yL)) + (count_-1)*diff + diff2)
else:
    print(100*((xR-xL) + (yR-yL)) + count_*diff)

Fixed submission:
# C
from bisect import bisect
import math
x1, y1, x2, y2 = map(int, input().split())
N = int(input())

xL = min(x1, x2)
xR = max(x1, x2)
yL = min(y1, y2)
yR = max(y1, y2)

xyl = []

if x1 < x2 and y1 > y2:
    direction = 'rightdown'
elif x1 > x2 and y1 < y2:
    direction = 'rightdown'
else:
    direction = 'rightup'
    
    
# sort
if direction == 'rightup':
    for _ in range(N):
        x, y = map(int, input().split())
        if xL <= x and x <= xR and yL <= y and y <= yR:
            xyl.append((x, y-yL))
else:
    for _ in range(N):
        x, y = map(int, input().split())
        if xL <= x and x <= xR and yL <= y and y <= yR:
            xyl.append((x, yR-y))

ind = len(xyl)
xyl.sort()

# calculate
dp = [yR-yL+1]*(ind)
for i in range(ind):
    _, y = xyl[i]
    dp[bisect(dp,y)] = y
count_ = bisect(dp,yR-yL)

diff = 5*math.pi - 20
diff2 = 10*math.pi - 20
if count_ == min((xR-xL), (yR-yL)) + 1:
    print(100*((xR-xL) + (yR-yL)) + (count_-1)*diff + diff2)
else:
    print(100*((xR-xL) + (yR-yL)) + count_*diff)