Task1

Task1.py

def abs(k):
    if k>=0:
        return k
    else:
        return -k

def dist(ax,ay,bx,by):
    if ax == bx:
        return abs(ay-by)
    elif ay==by:
        return abs(ax-bx)
    return ((ax-bx)**2+(ay-by)**2)**0.5

ax,ay = [int(i) for i in input().split()]
bx,by = [int(i) for i in input().split()]

a = abs(ax-bx)
b = abs(ay-by)
mn = min(a,b)
mx = max(a,b)
sqs = mn
print(sqs+(mx-mn))