Combinatorics

Rooks
LOJ-1005
Easy
Solved by: 3434
Success rate: 44.41%
Parallelogram Counting
LOJ-1058
Medium
Solved by: 801
Success rate: 36.25%
Combinations
LOJ-1067
Medium
Solved by: 2349
Success rate: 39.86%
Arrange the Numbers
LOJ-1095
Medium
Solved by: 819
Success rate: 50.79%
Problem Makes Problem
LOJ-1102
Medium
Solved by: 1193
Success rate: 49.30%
How Many Zeroes?
LOJ-1140
Medium
Solved by: 1124
Success rate: 71.80%
Counting Perfect BST
LOJ-1170
Medium Hard
Solved by: 728
Success rate: 36.59%
The Vindictive Coach
LOJ-1173
Medium Hard
Solved by: 306
Success rate: 52.14%
One Unit Machine
LOJ-1226
Medium Hard
Solved by: 427
Success rate: 70.03%
Colorful Board
LOJ-1246
Hard
Solved by: 200
Success rate: 39.22%
Fantasy Cricket
LOJ-1299
Hard
Solved by: 158
Success rate: 64.84%
Strange Game
LOJ-1318
Hard
Solved by: 117
Success rate: 37.53%
Worst Case Trie
LOJ-1322
Hard
Solved by: 169
Success rate: 36.71%
Race
LOJ-1326
Medium
Solved by: 936
Success rate: 59.83%
Grid Coloring
LOJ-1333
Medium Hard
Solved by: 261
Success rate: 30.34%
Strange Summation
LOJ-1352
Hard
Solved by: 80
Success rate: 45.24%
ICPC Guards
LOJ-1365
Hard
Solved by: 51
Success rate: 49.63%
Pair of Touching Circles
LOJ-1366
Hard
Solved by: 109
Success rate: 46.52%
Energetic Pandas
LOJ-1371
Medium Hard
Solved by: 286
Success rate: 75.31%
The Queue
LOJ-1382
Medium Hard
Solved by: 422
Success rate: 55.14%
Necklace
LOJ-1419
Medium Hard
Solved by: 391
Success rate: 66.63%