Combinatorics

Rooks
LOJ-1005
Easy
Solved by: 3367
Success rate: 44.44%
Parallelogram Counting
LOJ-1058
Medium
Solved by: 785
Success rate: 36.38%
Combinations
LOJ-1067
Medium
Solved by: 2305
Success rate: 39.64%
Arrange the Numbers
LOJ-1095
Medium
Solved by: 807
Success rate: 50.71%
Problem Makes Problem
LOJ-1102
Medium
Solved by: 1139
Success rate: 49.34%
How Many Zeroes?
LOJ-1140
Medium
Solved by: 1119
Success rate: 71.76%
Counting Perfect BST
LOJ-1170
Medium Hard
Solved by: 718
Success rate: 36.71%
The Vindictive Coach
LOJ-1173
Medium Hard
Solved by: 303
Success rate: 52.55%
One Unit Machine
LOJ-1226
Medium Hard
Solved by: 425
Success rate: 70.04%
Colorful Board
LOJ-1246
Hard
Solved by: 199
Success rate: 39.59%
Fantasy Cricket
LOJ-1299
Hard
Solved by: 157
Success rate: 64.75%
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: 930
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: 284
Success rate: 75.21%
The Queue
LOJ-1382
Medium Hard
Solved by: 416
Success rate: 54.94%
Necklace
LOJ-1419
Medium Hard
Solved by: 380
Success rate: 66.45%