"There will be no life for you yet…"

In Berland, presidential elections are being held again. As part of the campaign "There will be no life for you yet…" of the main candidate, it was decided to publish the Country's Horoscope for the duration of the presidency if our candidate wins.

For this purpose, the renowned astrologer Pavel Globus was enlisted. His task is to determine the number of unlucky years during the New President's term. After many sleepless nights of calculations, Pavel Globus realized that a year is considered unlucky if and only if the digit $3$ appears in its decimal representation. However, the famous astrologer does not know how to use a computer. Help him calculate the number of unlucky years from year $N$ to year $M$, inclusive.