Combinatorics

Rooks
LOJ-1005
Easy
Solved by: 3560
Success rate: 44.44%
Parallelogram Counting
LOJ-1058
Medium
Solved by: 838
Success rate: 35.55%
Combinations
LOJ-1067
Medium
Solved by: 2435
Success rate: 40.21%
Arrange the Numbers
LOJ-1095
Medium
Solved by: 842
Success rate: 50.94%
Problem Makes Problem
LOJ-1102
Medium
Solved by: 1328
Success rate: 49.07%
How Many Zeroes?
LOJ-1140
Medium
Solved by: 1141
Success rate: 71.82%
Counting Perfect BST
LOJ-1170
Medium Hard
Solved by: 773
Success rate: 36.44%
The Vindictive Coach
LOJ-1173
Medium Hard
Solved by: 310
Success rate: 51.74%
One Unit Machine
LOJ-1226
Medium Hard
Solved by: 443
Success rate: 70.22%
Colorful Board
LOJ-1246
Hard
Solved by: 203
Success rate: 39.25%
Fantasy Cricket
LOJ-1299
Hard
Solved by: 158
Success rate: 64.84%
Strange Game
LOJ-1318
Hard
Solved by: 118
Success rate: 37.67%
Worst Case Trie
LOJ-1322
Hard
Solved by: 169
Success rate: 36.71%
Race
LOJ-1326
Medium
Solved by: 949
Success rate: 59.88%
Grid Coloring
LOJ-1333
Medium Hard
Solved by: 264
Success rate: 30.41%
Strange Summation
LOJ-1352
Hard
Solved by: 80
Success rate: 45.24%
ICPC Guards
LOJ-1365
Hard
Solved by: 52
Success rate: 50.00%
Pair of Touching Circles
LOJ-1366
Hard
Solved by: 113
Success rate: 46.63%
Energetic Pandas
LOJ-1371
Medium Hard
Solved by: 289
Success rate: 75.47%
The Queue
LOJ-1382
Medium Hard
Solved by: 429
Success rate: 55.35%
Necklace
LOJ-1419
Medium Hard
Solved by: 404
Success rate: 66.95%