for x in range(1,4900,-1):
n = 5150 + 5135 - x
k = 0
while n:
if n % 5 == 4:
k+=1
n//5
if k == 134:
print(x)
break
n = 5150 + 5135 - x
k = 0
while n:
if n % 5 == 4:
k+=1
n//5
if k == 134:
print(x)
break