n = input()
n = int(n)
if 200 <=n <=299:
    print(n+50)
elif 300 <= n <=499:
    print(n+100)
elif n >=500:
    print(n+500)
elif n <= 200:
    print(n)

/**************************************************************
	Problem: 1391
	User: mariooo
	Language: C++
	Result: Compile Error
****************************************************************/