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: 3016
Success rate: 47.82%
Drunk
LOJ-1003
Medium
Solved by: 1844
Success rate: 28.37%
Back to Underworld
LOJ-1009
Easy
Solved by: 3728
Success rate: 32.65%
Guilty Prince
LOJ-1012
Easy
Solved by: 5125
Success rate: 77.30%
Brush (V)
LOJ-1019
Medium
Solved by: 2282
Success rate: 53.03%
Critical Links
LOJ-1026
Medium
Solved by: 1378
Success rate: 43.95%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1738
Success rate: 62.43%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1397
Success rate: 39.06%
A Toy Company
LOJ-1039
Medium
Solved by: 1092
Success rate: 51.00%
Donation
LOJ-1040
Medium
Solved by: 1333
Success rate: 61.03%
Road Construction
LOJ-1041
Medium
Solved by: 1560
Success rate: 64.00%
Rider
LOJ-1046
Medium
Solved by: 1029
Success rate: 58.35%
One Way Roads
LOJ-1049
Medium
Solved by: 1674
Success rate: 72.01%
Going Together
LOJ-1055
Medium Hard
Solved by: 478
Success rate: 33.67%
Air Ports
LOJ-1059
Medium
Solved by: 1110
Success rate: 46.55%
Ant Hills
LOJ-1063
Medium
Solved by: 1368
Success rate: 50.41%
Gathering Food
LOJ-1066
Medium
Solved by: 1393
Success rate: 42.97%
Extended Traffic
LOJ-1074
Medium
Solved by: 1143
Success rate: 30.75%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 426
Success rate: 43.80%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2765
Success rate: 54.63%
Not the Best
LOJ-1099
Medium
Solved by: 1286
Success rate: 39.75%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 547
Success rate: 28.85%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2028
Success rate: 47.16%
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: 1724
Success rate: 34.68%
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: 2506
Success rate: 55.62%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1130
Success rate: 34.63%
Escape
LOJ-1185
Medium Hard
Solved by: 545
Success rate: 38.04%
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: 411
Success rate: 60.28%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1948
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: 39.06%
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: 1305
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: 701
Success rate: 36.08%
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: 288
Success rate: 52.46%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1487
Success rate: 29.14%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 887
Success rate: 31.42%