Graph Theory

2-SAT

Articulation/Bridge/Biconnected Component

Breadth First Search/Depth First Search

Cycles/Topological Sorting/Strongly Connected Component

Directed Minimum Spanning Tree

Euler Trail/Circuit

Heavy-Light Decomposition

Kirchhoff's theorem

Minimum Spanning Tree

Shortest Path

Stable Marriage Problem

Country Roads
LOJ-1002
Easy
Solved by: 3028
Success rate: 47.87%
Drunk
LOJ-1003
Medium
Solved by: 1853
Success rate: 28.36%
Back to Underworld
LOJ-1009
Easy
Solved by: 3740
Success rate: 32.60%
Guilty Prince
LOJ-1012
Easy
Solved by: 5149
Success rate: 77.34%
Brush (V)
LOJ-1019
Medium
Solved by: 2286
Success rate: 53.05%
Critical Links
LOJ-1026
Medium
Solved by: 1380
Success rate: 43.83%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1743
Success rate: 62.50%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1398
Success rate: 38.97%
A Toy Company
LOJ-1039
Medium
Solved by: 1095
Success rate: 51.03%
Donation
LOJ-1040
Medium
Solved by: 1335
Success rate: 61.03%
Road Construction
LOJ-1041
Medium
Solved by: 1564
Success rate: 64.01%
Rider
LOJ-1046
Medium
Solved by: 1031
Success rate: 58.37%
One Way Roads
LOJ-1049
Medium
Solved by: 1678
Success rate: 72.02%
Going Together
LOJ-1055
Medium Hard
Solved by: 478
Success rate: 33.67%
Air Ports
LOJ-1059
Medium
Solved by: 1111
Success rate: 46.50%
Ant Hills
LOJ-1063
Medium
Solved by: 1369
Success rate: 50.42%
Gathering Food
LOJ-1066
Medium
Solved by: 1393
Success rate: 42.97%
Extended Traffic
LOJ-1074
Medium
Solved by: 1149
Success rate: 30.73%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 430
Success rate: 43.81%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2771
Success rate: 54.69%
Not the Best
LOJ-1099
Medium
Solved by: 1289
Success rate: 39.68%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 550
Success rate: 28.86%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2033
Success rate: 47.17%
Filling the Regions
LOJ-1115
Hard
Solved by: 201
Success rate: 45.72%
Trail Maintenance
LOJ-1123
Medium
Solved by: 766
Success rate: 33.75%
Number Transformation
LOJ-1141
Medium
Solved by: 1731
Success rate: 34.78%
Digit Dancing
LOJ-1165
Hard
Solved by: 174
Success rate: 43.18%
Wishing Snake
LOJ-1168
Medium Hard
Solved by: 454
Success rate: 25.51%
Commandos
LOJ-1174
Medium
Solved by: 2515
Success rate: 55.56%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1133
Success rate: 34.68%
Escape
LOJ-1185
Medium Hard
Solved by: 546
Success rate: 38.00%
Dangerous Bull! Who Wants to Pull?
LOJ-1208
Hard
Solved by: 78
Success rate: 19.47%
Efficient Traffic System
LOJ-1210
Medium Hard
Solved by: 738
Success rate: 33.56%
Travel Company
LOJ-1221
Medium Hard
Solved by: 412
Success rate: 60.26%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1949
Success rate: 62.39%
Village Postman
LOJ-1250
Hard
Solved by: 66
Success rate: 33.00%
Forming the Council
LOJ-1251
Medium Hard
Solved by: 434
Success rate: 39.05%
Prison Break
LOJ-1254
Medium Hard
Solved by: 356
Success rate: 37.12%
Word Puzzle
LOJ-1256
Hard
Solved by: 153
Success rate: 27.86%
Farthest Nodes in a Tree (II)
LOJ-1257
Medium
Solved by: 1572
Success rate: 54.56%
Equalizing Money
LOJ-1263
Medium
Solved by: 1307
Success rate: 46.19%
Better Tour
LOJ-1271
Medium Hard
Solved by: 532
Success rate: 38.65%
New Traffic System
LOJ-1281
Medium Hard
Solved by: 702
Success rate: 36.04%
Real Life Traffic
LOJ-1291
Medium Hard
Solved by: 668
Success rate: 35.89%
Odd Personality
LOJ-1300
Medium Hard
Solved by: 450
Success rate: 33.11%
Ant Network
LOJ-1308
Medium Hard
Solved by: 288
Success rate: 30.92%
A Wedding Party
LOJ-1316
Medium Hard
Solved by: 277
Success rate: 20.58%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 289
Success rate: 52.52%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1488
Success rate: 29.13%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 887
Success rate: 31.41%