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

/**************************************************************
	Problem: 1391
	User: mariooo
	Language: Python
	Result: Accepted
	Time:302 ms
	Memory:34244 kb
****************************************************************/