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: 3103
Success rate: 47.95%
Drunk
LOJ-1003
Medium
Solved by: 1923
Success rate: 28.52%
Back to Underworld
LOJ-1009
Easy
Solved by: 3824
Success rate: 32.59%
Guilty Prince
LOJ-1012
Easy
Solved by: 5301
Success rate: 77.67%
Brush (V)
LOJ-1019
Medium
Solved by: 2348
Success rate: 53.39%
Critical Links
LOJ-1026
Medium
Solved by: 1397
Success rate: 43.70%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1778
Success rate: 62.83%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1420
Success rate: 38.95%
A Toy Company
LOJ-1039
Medium
Solved by: 1110
Success rate: 51.04%
Donation
LOJ-1040
Medium
Solved by: 1351
Success rate: 61.10%
Road Construction
LOJ-1041
Medium
Solved by: 1588
Success rate: 64.20%
Rider
LOJ-1046
Medium
Solved by: 1044
Success rate: 58.38%
One Way Roads
LOJ-1049
Medium
Solved by: 1709
Success rate: 71.96%
Going Together
LOJ-1055
Medium Hard
Solved by: 482
Success rate: 33.24%
Air Ports
LOJ-1059
Medium
Solved by: 1136
Success rate: 46.77%
Ant Hills
LOJ-1063
Medium
Solved by: 1383
Success rate: 50.42%
Gathering Food
LOJ-1066
Medium
Solved by: 1410
Success rate: 42.83%
Extended Traffic
LOJ-1074
Medium
Solved by: 1173
Success rate: 30.90%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 437
Success rate: 43.94%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2838
Success rate: 54.89%
Not the Best
LOJ-1099
Medium
Solved by: 1326
Success rate: 39.85%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 558
Success rate: 28.77%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2082
Success rate: 47.22%
Filling the Regions
LOJ-1115
Hard
Solved by: 202
Success rate: 45.79%
Trail Maintenance
LOJ-1123
Medium
Solved by: 771
Success rate: 33.74%
Number Transformation
LOJ-1141
Medium
Solved by: 1752
Success rate: 34.66%
Digit Dancing
LOJ-1165
Hard
Solved by: 174
Success rate: 43.18%
Wishing Snake
LOJ-1168
Medium Hard
Solved by: 457
Success rate: 25.41%
Commandos
LOJ-1174
Medium
Solved by: 2578
Success rate: 55.67%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1150
Success rate: 34.84%
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: 423
Success rate: 60.56%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1977
Success rate: 62.24%
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: 1592
Success rate: 54.69%
Equalizing Money
LOJ-1263
Medium
Solved by: 1340
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: 714
Success rate: 36.22%
Real Life Traffic
LOJ-1291
Medium Hard
Solved by: 671
Success rate: 35.57%
Odd Personality
LOJ-1300
Medium Hard
Solved by: 451
Success rate: 32.76%
Ant Network
LOJ-1308
Medium Hard
Solved by: 292
Success rate: 30.71%
A Wedding Party
LOJ-1316
Medium Hard
Solved by: 280
Success rate: 20.36%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 290
Success rate: 52.57%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1506
Success rate: 29.23%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 906
Success rate: 31.43%