#Python3

while True:

try:

n = int(input('n = '))

break

except:

pass

while True:

try:

a = int(input('A = '))

break

except:

pass

while True:

try:

b = int(input('B = '))

if b - a >= n:

break

except:

pass

nums = []

for i in range(n):

while True:

try:

m = int(input('input number: '))

if m in range(a, b)

break

else:

print('input number out if range')

except:

pass

nums.append(m)

max = -10000000

for i in nums:

if i > max:

max = i

print(max)