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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: 2894
Success rate: 53.04%
Square Queries
LOJ-1081
Medium Hard
Solved by: 520
Success rate: 32.17%
Array Queries
LOJ-1082
Easy
Solved by: 4552
Success rate: 57.95%
Histogram
LOJ-1083
Medium
Solved by: 1997
Success rate: 57.44%
All Possible Increasing Subsequences
LOJ-1085
Medium
Solved by: 1444
Success rate: 41.82%
Diablo
LOJ-1087
Medium
Solved by: 1598
Success rate: 44.19%
Points in Segments (II)
LOJ-1089
Medium
Solved by: 1340
Success rate: 38.43%
Ghajini
LOJ-1093
Medium
Solved by: 1825
Success rate: 59.61%
Lucky Number
LOJ-1097
Medium
Solved by: 846
Success rate: 74.17%
A Secret Mission
LOJ-1101
Medium Hard
Solved by: 744
Success rate: 36.75%
Castle Walls
LOJ-1103
Medium Hard
Solved by: 326
Success rate: 49.21%
Curious Robin Hood
LOJ-1112
Easy
Solved by: 4357
Success rate: 50.64%
Discover the Web
LOJ-1113
Easy
Solved by: 3835
Success rate: 45.46%
Easily Readable
LOJ-1114
Medium
Solved by: 909
Success rate: 30.11%
Rectangle Union
LOJ-1120
Medium Hard
Solved by: 353
Success rate: 40.12%
Greatest Parent
LOJ-1128
Medium Hard
Solved by: 652
Success rate: 56.43%
Consistency Checker
LOJ-1129
Medium
Solved by: 1643
Success rate: 36.93%
Count the Multiples of 3
LOJ-1135
Medium
Solved by: 1252
Success rate: 44.53%
Min Max Roads
LOJ-1162
Medium Hard
Solved by: 702
Success rate: 46.37%
Horrible Queries
LOJ-1164
Medium
Solved by: 1903
Success rate: 36.33%
Computing Fast Average
LOJ-1183
Medium
Solved by: 1139
Success rate: 43.66%
Lining up Students
LOJ-1187
Medium Hard
Solved by: 611
Success rate: 63.14%
Fast Queries
LOJ-1188
Medium
Solved by: 1100
Success rate: 42.64%
Weird Advertisement
LOJ-1204
Hard
Solved by: 84
Success rate: 32.22%
Posters for Election
LOJ-1207
Medium
Solved by: 838
Success rate: 47.34%
Double Ended Queue
LOJ-1212
Easy
Solved by: 3391
Success rate: 46.94%
DNA Prefix
LOJ-1224
Medium
Solved by: 1383
Success rate: 45.47%
Points in Rectangle
LOJ-1266
Medium Hard
Solved by: 927
Success rate: 44.28%
Points in Rectangle (II)
LOJ-1267
Hard
Solved by: 142
Success rate: 35.74%
Consecutive Sum
LOJ-1269
Medium Hard
Solved by: 591
Success rate: 47.27%
Document Analyzer
LOJ-1293
Hard
Solved by: 137
Success rate: 57.69%
Ferris Wheel
LOJ-1303
Medium Hard
Solved by: 485
Success rate: 59.30%
Strongest Community
LOJ-1339
Medium Hard
Solved by: 675
Success rate: 46.23%
Aladdin and the Black Stones
LOJ-1343
Hard
Solved by: 117
Success rate: 43.46%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 913
Success rate: 31.46%
Sabotaging Contest
LOJ-1359
Hard
Solved by: 48
Success rate: 36.97%
Hexagonal Bamboo Fort
LOJ-1372
Hard
Solved by: 83
Success rate: 51.24%
Line Chart
LOJ-1402
Hard
Solved by: 41
Success rate: 30.43%
Rip Van Winkle's Code
LOJ-1411
Hard
Solved by: 183
Success rate: 24.14%
Save the Trees
LOJ-1415
Hard
Solved by: 178
Success rate: 30.47%
Olympic Swimming
LOJ-1423
Hard
Solved by: 92
Success rate: 34.90%
New Land
LOJ-1424
Medium Hard
Solved by: 459
Success rate: 57.50%
Blind Escape
LOJ-1426
Hard
Solved by: 69
Success rate: 34.31%
Tree Flip
Solved by: 5
Success rate: 7.78%
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