题解 | 绕距

import math

# 输入两点坐标
x1, y1 = map(int, input().split()) # 输入字符串-字符串分开，变成列表-转成整数-map 赋值x1,y1
x2, y2 = map(int, input().split())

# 欧几里得距离
d_E = math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)  #math.sqrt 求平方根

# 曼哈顿距离
d_M = abs(x1 - x2) + abs(y1 - y2) # abs绝对值

# 绕距
delta = abs(d_M - d_E)

# 输出
print(delta)