print(
[
0,
4,
22,
27,
58,
85,
94,
121,
166,
202,
265,
274,
319,
346,
355,
378,
382,
391,
438,
454,
483,
517,
526,
535,
562,
576,
588,
627,
634,
636,
645,
][int(input())]
)
550B - Preparing Olympiad | 939B - Hamster Farm |
732A - Buy a Shovel | 1220C - Substring Game in the Lesson |
452A - Eevee | 1647B - Madoka and the Elegant Gift |
1408A - Circle Coloring | 766B - Mahmoud and a Triangle |
1618C - Paint the Array | 469A - I Wanna Be the Guy |
1294A - Collecting Coins | 1227A - Math Problem |
349A - Cinema Line | 47A - Triangular numbers |
1516B - AGAGA XOOORRR | 1515A - Phoenix and Gold |
1515B - Phoenix and Puzzle | 155A - I_love_username |
49A - Sleuth | 1541A - Pretty Permutations |
1632C - Strange Test | 673A - Bear and Game |
276A - Lunch Rush | 1205A - Almost Equal |
1020B - Badge | 1353A - Most Unstable Array |
770A - New Password | 1646B - Quality vs Quantity |
80A - Panoramix's Prediction | 1354B - Ternary String |