Combinatorics

Rooks
LOJ-1005
Easy
Solved by: 3566
Success rate: 44.46%
Parallelogram Counting
LOJ-1058
Medium
Solved by: 841
Success rate: 35.61%
Combinations
LOJ-1067
Medium
Solved by: 2439
Success rate: 40.24%
Arrange the Numbers
LOJ-1095
Medium
Solved by: 843
Success rate: 50.96%
Problem Makes Problem
LOJ-1102
Medium
Solved by: 1331
Success rate: 49.09%
How Many Zeroes?
LOJ-1140
Medium
Solved by: 1144
Success rate: 71.86%
Counting Perfect BST
LOJ-1170
Medium Hard
Solved by: 776
Success rate: 36.47%
The Vindictive Coach
LOJ-1173
Medium Hard
Solved by: 310
Success rate: 51.74%
One Unit Machine
LOJ-1226
Medium Hard
Solved by: 445
Success rate: 70.31%
Colorful Board
LOJ-1246
Hard
Solved by: 204
Success rate: 39.33%
Fantasy Cricket
LOJ-1299
Hard
Solved by: 159
Success rate: 64.44%
Strange Game
LOJ-1318
Hard
Solved by: 119
Success rate: 37.72%
Worst Case Trie
LOJ-1322
Hard
Solved by: 170
Success rate: 36.78%
Race
LOJ-1326
Medium
Solved by: 952
Success rate: 59.82%
Grid Coloring
LOJ-1333
Medium Hard
Solved by: 265
Success rate: 30.44%
Strange Summation
LOJ-1352
Hard
Solved by: 81
Success rate: 45.67%
ICPC Guards
LOJ-1365
Hard
Solved by: 52
Success rate: 50.00%
Pair of Touching Circles
LOJ-1366
Hard
Solved by: 114
Success rate: 46.77%
Energetic Pandas
LOJ-1371
Medium Hard
Solved by: 290
Success rate: 75.52%
The Queue
LOJ-1382
Medium Hard
Solved by: 429
Success rate: 55.39%
Necklace
LOJ-1419
Medium Hard
Solved by: 405
Success rate: 66.99%