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: 3084
Success rate: 47.84%
Drunk
LOJ-1003
Medium
Solved by: 1891
Success rate: 28.32%
Back to Underworld
LOJ-1009
Easy
Solved by: 3799
Success rate: 32.57%
Guilty Prince
LOJ-1012
Easy
Solved by: 5270
Success rate: 77.58%
Brush (V)
LOJ-1019
Medium
Solved by: 2335
Success rate: 53.32%
Critical Links
LOJ-1026
Medium
Solved by: 1391
Success rate: 43.66%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1766
Success rate: 62.70%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1414
Success rate: 38.88%
A Toy Company
LOJ-1039
Medium
Solved by: 1107
Success rate: 50.97%
Donation
LOJ-1040
Medium
Solved by: 1345
Success rate: 61.02%
Road Construction
LOJ-1041
Medium
Solved by: 1577
Success rate: 64.08%
Rider
LOJ-1046
Medium
Solved by: 1042
Success rate: 58.34%
One Way Roads
LOJ-1049
Medium
Solved by: 1698
Success rate: 72.06%
Going Together
LOJ-1055
Medium Hard
Solved by: 480
Success rate: 33.47%
Air Ports
LOJ-1059
Medium
Solved by: 1132
Success rate: 46.72%
Ant Hills
LOJ-1063
Medium
Solved by: 1378
Success rate: 50.44%
Gathering Food
LOJ-1066
Medium
Solved by: 1405
Success rate: 42.84%
Extended Traffic
LOJ-1074
Medium
Solved by: 1168
Success rate: 30.83%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 435
Success rate: 43.89%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2823
Success rate: 54.94%
Not the Best
LOJ-1099
Medium
Solved by: 1313
Success rate: 39.83%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 555
Success rate: 28.82%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2070
Success rate: 47.18%
Filling the Regions
LOJ-1115
Hard
Solved by: 202
Success rate: 45.79%
Trail Maintenance
LOJ-1123
Medium
Solved by: 769
Success rate: 33.75%
Number Transformation
LOJ-1141
Medium
Solved by: 1746
Success rate: 34.69%
Digit Dancing
LOJ-1165
Hard
Solved by: 174
Success rate: 43.18%
Wishing Snake
LOJ-1168
Medium Hard
Solved by: 456
Success rate: 25.37%
Commandos
LOJ-1174
Medium
Solved by: 2564
Success rate: 55.61%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1145
Success rate: 34.78%
Escape
LOJ-1185
Medium Hard
Solved by: 551
Success rate: 38.01%
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: 33.52%
Travel Company
LOJ-1221
Medium Hard
Solved by: 417
Success rate: 60.39%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1969
Success rate: 62.37%
Village Postman
LOJ-1250
Hard
Solved by: 66
Success rate: 33.00%
Forming the Council
LOJ-1251
Medium Hard
Solved by: 439
Success rate: 39.33%
Prison Break
LOJ-1254
Medium Hard
Solved by: 356
Success rate: 37.16%
Word Puzzle
LOJ-1256
Hard
Solved by: 153
Success rate: 27.83%
Farthest Nodes in a Tree (II)
LOJ-1257
Medium
Solved by: 1583
Success rate: 54.61%
Equalizing Money
LOJ-1263
Medium
Solved by: 1321
Success rate: 46.19%
Better Tour
LOJ-1271
Medium Hard
Solved by: 533
Success rate: 38.66%
New Traffic System
LOJ-1281
Medium Hard
Solved by: 713
Success rate: 36.19%
Real Life Traffic
LOJ-1291
Medium Hard
Solved by: 670
Success rate: 35.63%
Odd Personality
LOJ-1300
Medium Hard
Solved by: 451
Success rate: 32.77%
Ant Network
LOJ-1308
Medium Hard
Solved by: 291
Success rate: 30.67%
A Wedding Party
LOJ-1316
Medium Hard
Solved by: 278
Success rate: 20.37%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 290
Success rate: 52.57%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1496
Success rate: 29.14%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 902
Success rate: 31.37%