숙제 [행복]

n = int(input())

t=[]

for i in range(n) :

d=input()

t.append(d)

small = 1001

m = -1

for i in range(n) :

if small > t[n] :

small = t[n]

if m < t[n] :

m < t[n]

s = m - small

print(s)