题解 | 绕距

import sys

import math

x = []

for line in sys.stdin:
    a = line.split()
    x.append(a)

e = math.sqrt((float(x[0][0]) - float(x[1][0])) ** 2 + (float(x[0][1]) - float(x[1][1])) ** 2)

if float(x[0][0]) > float(x[1][0]):
    c = float(x[0][0]) - float(x[1][0])
else:
    c = float(x[1][0]) - float(x[0][0])

if float(x[0][1]) > float(x[1][1]):
    d = float(x[0][1]) - float(x[1][1])
else:
    d = float(x[1][1]) - float(x[0][1])

m = c + d

if e > m:
    v = e - m
else:
    v = m - e         

print(v)