#zadanie 4
n = int(input())
suma = 0
for i in range(n+1):
if i%10 == 2 or i%10 == 3 or i%10 == 5:
suma+=i
print(suma)
I3phZGFuaWUgNApuID0gaW50KGlucHV0KCkpCnN1bWEgPSAwIApmb3IgaSBpbiByYW5nZShuKzEpOgoJaWYgaSUxMCA9PSAyIG9yIGklMTAgPT0gMyBvciBpJTEwID09IDU6CgkJc3VtYSs9aQpwcmludChzdW1hKQ==