import sys
def round50(n):
return round(n * 2, -2) // 2
for n in map(int, sys.stdin):
print("{} -> {}".format(n, round50(n)))
aW1wb3J0IHN5cwoKZGVmIHJvdW5kNTAobik6CiAgICByZXR1cm4gcm91bmQobiAqIDIsIC0yKSAvLyAyCiAgICAKZm9yIG4gaW4gbWFwKGludCwgc3lzLnN0ZGluKToKICAgIHByaW50KCJ7fSAtPiB7fSIuZm9ybWF0KG4sIHJvdW5kNTAobikpKQog