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: xiaomingze
	Language: Python
	Result: Wrong Answer
****************************************************************/