import sys
data = [int(x) for x in sys.stdin.readlines()[0].rstrip().split()]
# put your python code here
print (data) # Change this

 def dist(x, y):
    return ((x[0] - y[0]) ** 2 + (x[1] - y[1]) ** 2) ** 0.5
 
a = [(12, 76.5), (-5.123, 58), (1.1, 2), (3.1, 4.15), (100, 100)]
 
distances = [] 
 
for p1 in a:
    for p2 in a:
        if p1 != p2:
            distances.append((p1, p2, dist(p1, p2)))
 
p1, p2, distance = max(distances,key= lambda t: t[2])
print(distance)

 import sys
data = [int(x) for x in sys.stdin.readlines()[0].rstrip().split()]
dist = int(((data[0] - data[2]) ** 2 + (data[1] - data[3]) ** 2) ** 0.5)
print (dist) # Change this