Final: Upstairs/Downstairs
21 correct small sets and 16 correct large sets. View problem statement or contest analysis.
Compact solutions
   Farmer.John in C++ (1012 B)  paladin8 in C++ (1245 B)  SnapDragon in C++ (1321 B)  paladin8 in C++ (1372 B)  exod40 in C++ (1420 B)  watashi in C++ (1487 B)  Ahyangyi in C++ (1513 B)  rng..58 in C++ (1595 B) |    g201513 in C++ (1664 B)  Farmer.John in C++ (1918 B)  misof in C++ (1994 B)  sdya in C++ (2028 B)  Dlougach in C++ (2165 B)  Vasyl in C++ (2196 B)  meret in C++ (2371 B)  vepifanov in C++ (2386 B) |    exod40 in C++ (2417 B)  neal.wu in C++ (2465 B)  chokudai in C# (2627 B)  bmerry in C++ (2824 B)  hos.lyric in D (3050 B)  dzhulgakov in C++ (3108 B)  hos.lyric in D (3529 B)  Burunduk1 in C++ (4833 B) | 
Solved in...
| C++ (32 sets) D (2 sets)  | Java (2 sets) C# (1 set)  | 
Submission Origin
| Russia (4 contestants) Ukraine (3 contestants) Japan (3 contestants) China (3 contestants)  | United States (2 contestants) South Africa (1 contestant) Slovakia (1 contestant) Poland (1 contestant)  | Hong Kong (1 contestant) Canada (1 contestant) Bulgaria (1 contestant)  | 
