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Data Structures

Maximum User Solved Minimum User Solved Difficulty Easy to Hard Difficulty Hard to Easy LightOJ ID Ascending LightOJ ID Descending

Basic Data Structures

Binary Indexed Tree

Binary Search Tree

Centroid Decomposition

Hashing/Hash Map

Orthogonal Range Search

Queue

Range Minimum Query/Lowest Common Ancestor

Segment Tree/Interval Tree

Stack

Trie Tree

Binary Simulation
LOJ-1080
Easy
Solved by: 2865
Success rate: 53.00%
Square Queries
LOJ-1081
Medium Hard
Solved by: 519
Success rate: 32.15%
Array Queries
LOJ-1082
Easy
Solved by: 4524
Success rate: 57.93%
Histogram
LOJ-1083
Medium
Solved by: 1983
Success rate: 57.40%
All Possible Increasing Subsequences
LOJ-1085
Medium
Solved by: 1438
Success rate: 41.75%
Diablo
LOJ-1087
Medium
Solved by: 1589
Success rate: 44.15%
Points in Segments (II)
LOJ-1089
Medium
Solved by: 1327
Success rate: 38.40%
Ghajini
LOJ-1093
Medium
Solved by: 1809
Success rate: 59.74%
Lucky Number
LOJ-1097
Medium
Solved by: 841
Success rate: 74.05%
A Secret Mission
LOJ-1101
Medium Hard
Solved by: 733
Success rate: 36.49%
Castle Walls
LOJ-1103
Medium Hard
Solved by: 326
Success rate: 49.26%
Curious Robin Hood
LOJ-1112
Easy
Solved by: 4244
Success rate: 50.55%
Discover the Web
LOJ-1113
Easy
Solved by: 3820
Success rate: 45.46%
Easily Readable
LOJ-1114
Medium
Solved by: 902
Success rate: 30.14%
Rectangle Union
LOJ-1120
Medium Hard
Solved by: 350
Success rate: 40.15%
Greatest Parent
LOJ-1128
Medium Hard
Solved by: 649
Success rate: 56.39%
Consistency Checker
LOJ-1129
Medium
Solved by: 1634
Success rate: 36.88%
Count the Multiples of 3
LOJ-1135
Medium
Solved by: 1243
Success rate: 44.49%
Min Max Roads
LOJ-1162
Medium Hard
Solved by: 683
Success rate: 46.51%
Horrible Queries
LOJ-1164
Medium
Solved by: 1895
Success rate: 36.24%
Computing Fast Average
LOJ-1183
Medium
Solved by: 1135
Success rate: 43.65%
Lining up Students
LOJ-1187
Medium Hard
Solved by: 610
Success rate: 63.12%
Fast Queries
LOJ-1188
Medium
Solved by: 1098
Success rate: 42.74%
Weird Advertisement
LOJ-1204
Hard
Solved by: 84
Success rate: 32.22%
Posters for Election
LOJ-1207
Medium
Solved by: 835
Success rate: 47.26%
Double Ended Queue
LOJ-1212
Easy
Solved by: 3376
Success rate: 46.84%
DNA Prefix
LOJ-1224
Medium
Solved by: 1377
Success rate: 45.56%
Points in Rectangle
LOJ-1266
Medium Hard
Solved by: 915
Success rate: 44.26%
Points in Rectangle (II)
LOJ-1267
Hard
Solved by: 134
Success rate: 35.89%
Consecutive Sum
LOJ-1269
Medium Hard
Solved by: 588
Success rate: 47.45%
Document Analyzer
LOJ-1293
Hard
Solved by: 137
Success rate: 57.69%
Ferris Wheel
LOJ-1303
Medium Hard
Solved by: 482
Success rate: 59.73%
Strongest Community
LOJ-1339
Medium Hard
Solved by: 667
Success rate: 46.14%
Aladdin and the Black Stones
LOJ-1343
Hard
Solved by: 117
Success rate: 43.63%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 906
Success rate: 31.43%
Sabotaging Contest
LOJ-1359
Hard
Solved by: 48
Success rate: 36.97%
Hexagonal Bamboo Fort
LOJ-1372
Hard
Solved by: 83
Success rate: 51.42%
Line Chart
LOJ-1402
Hard
Solved by: 41
Success rate: 30.84%
Rip Van Winkle's Code
LOJ-1411
Hard
Solved by: 183
Success rate: 24.14%
Save the Trees
LOJ-1415
Hard
Solved by: 177
Success rate: 30.46%
Olympic Swimming
LOJ-1423
Hard
Solved by: 92
Success rate: 34.90%
New Land
LOJ-1424
Medium Hard
Solved by: 458
Success rate: 57.61%
Blind Escape
LOJ-1426
Hard
Solved by: 68
Success rate: 34.18%
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