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: 3047
Success rate: 47.94%
Drunk
LOJ-1003
Medium
Solved by: 1866
Success rate: 28.39%
Back to Underworld
LOJ-1009
Easy
Solved by: 3758
Success rate: 32.54%
Guilty Prince
LOJ-1012
Easy
Solved by: 5173
Success rate: 77.35%
Brush (V)
LOJ-1019
Medium
Solved by: 2309
Success rate: 53.19%
Critical Links
LOJ-1026
Medium
Solved by: 1382
Success rate: 43.86%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1748
Success rate: 62.53%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1401
Success rate: 39.00%
A Toy Company
LOJ-1039
Medium
Solved by: 1097
Success rate: 51.05%
Donation
LOJ-1040
Medium
Solved by: 1336
Success rate: 61.05%
Road Construction
LOJ-1041
Medium
Solved by: 1566
Success rate: 63.99%
Rider
LOJ-1046
Medium
Solved by: 1034
Success rate: 58.39%
One Way Roads
LOJ-1049
Medium
Solved by: 1686
Success rate: 72.07%
Going Together
LOJ-1055
Medium Hard
Solved by: 478
Success rate: 33.67%
Air Ports
LOJ-1059
Medium
Solved by: 1122
Success rate: 46.62%
Ant Hills
LOJ-1063
Medium
Solved by: 1369
Success rate: 50.42%
Gathering Food
LOJ-1066
Medium
Solved by: 1394
Success rate: 42.95%
Extended Traffic
LOJ-1074
Medium
Solved by: 1150
Success rate: 30.72%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 430
Success rate: 43.81%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2783
Success rate: 54.76%
Not the Best
LOJ-1099
Medium
Solved by: 1292
Success rate: 39.67%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 550
Success rate: 28.86%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2049
Success rate: 47.12%
Filling the Regions
LOJ-1115
Hard
Solved by: 202
Success rate: 45.79%
Trail Maintenance
LOJ-1123
Medium
Solved by: 767
Success rate: 33.73%
Number Transformation
LOJ-1141
Medium
Solved by: 1734
Success rate: 34.77%
Digit Dancing
LOJ-1165
Hard
Solved by: 174
Success rate: 43.18%
Wishing Snake
LOJ-1168
Medium Hard
Solved by: 455
Success rate: 25.44%
Commandos
LOJ-1174
Medium
Solved by: 2521
Success rate: 55.57%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1136
Success rate: 34.72%
Escape
LOJ-1185
Medium Hard
Solved by: 549
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: 413
Success rate: 60.30%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1956
Success rate: 62.30%
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: 27.83%
Farthest Nodes in a Tree (II)
LOJ-1257
Medium
Solved by: 1574
Success rate: 54.51%
Equalizing Money
LOJ-1263
Medium
Solved by: 1308
Success rate: 46.17%
Better Tour
LOJ-1271
Medium Hard
Solved by: 532
Success rate: 38.65%
New Traffic System
LOJ-1281
Medium Hard
Solved by: 705
Success rate: 35.94%
Real Life Traffic
LOJ-1291
Medium Hard
Solved by: 668
Success rate: 35.89%
Odd Personality
LOJ-1300
Medium Hard
Solved by: 451
Success rate: 33.03%
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: 20.53%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 289
Success rate: 52.52%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1489
Success rate: 29.11%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 888
Success rate: 31.44%