x = int(input())
s = [1,2,5,10,23,50,121,290,755,1978,5525]
print(s[x-1])1654A - Maximum Cake Tastiness | 1649A - Game |
139A - Petr and Book | 1612A - Distance |
520A - Pangram | 124A - The number of positions |
1041A - Heist | 901A - Hashing Trees |
1283A - Minutes Before the New Year | 1654D - Potion Brewing Class |
1107B - Digital root | 25A - IQ test |
785A - Anton and Polyhedrons | 1542B - Plus and Multiply |
306A - Candies | 1651C - Fault-tolerant Network |
870A - Search for Pretty Integers | 1174A - Ehab Fails to Be Thanos |
1169A - Circle Metro | 780C - Andryusha and Colored Balloons |
1153A - Serval and Bus | 1487C - Minimum Ties |
1136A - Nastya Is Reading a Book | 1353B - Two Arrays And Swaps |
1490E - Accidental Victory | 1335A - Candies and Two Sisters |
96B - Lucky Numbers (easy) | 1151B - Dima and a Bad XOR |
1435B - A New Technique | 1633A - Div 7 |