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: 3132
Success rate: 47.98%
Drunk
LOJ-1003
Medium
Solved by: 1940
Success rate: 28.55%
Back to Underworld
LOJ-1009
Easy
Solved by: 3858
Success rate: 32.62%
Guilty Prince
LOJ-1012
Easy
Solved by: 5342
Success rate: 77.73%
Brush (V)
LOJ-1019
Medium
Solved by: 2361
Success rate: 53.48%
Critical Links
LOJ-1026
Medium
Solved by: 1416
Success rate: 43.66%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1785
Success rate: 62.85%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1424
Success rate: 38.92%
A Toy Company
LOJ-1039
Medium
Solved by: 1121
Success rate: 51.04%
Donation
LOJ-1040
Medium
Solved by: 1354
Success rate: 61.15%
Road Construction
LOJ-1041
Medium
Solved by: 1593
Success rate: 64.21%
Rider
LOJ-1046
Medium
Solved by: 1055
Success rate: 58.47%
One Way Roads
LOJ-1049
Medium
Solved by: 1714
Success rate: 71.95%
Going Together
LOJ-1055
Medium Hard
Solved by: 486
Success rate: 32.80%
Air Ports
LOJ-1059
Medium
Solved by: 1138
Success rate: 46.80%
Ant Hills
LOJ-1063
Medium
Solved by: 1400
Success rate: 50.55%
Gathering Food
LOJ-1066
Medium
Solved by: 1420
Success rate: 42.86%
Extended Traffic
LOJ-1074
Medium
Solved by: 1193
Success rate: 30.98%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 437
Success rate: 43.98%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2859
Success rate: 55.02%
Not the Best
LOJ-1099
Medium
Solved by: 1342
Success rate: 39.96%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 561
Success rate: 28.76%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2099
Success rate: 47.27%
Filling the Regions
LOJ-1115
Hard
Solved by: 203
Success rate: 45.94%
Trail Maintenance
LOJ-1123
Medium
Solved by: 773
Success rate: 33.75%
Number Transformation
LOJ-1141
Medium
Solved by: 1767
Success rate: 34.74%
Digit Dancing
LOJ-1165
Hard
Solved by: 174
Success rate: 43.18%
Wishing Snake
LOJ-1168
Medium Hard
Solved by: 458
Success rate: 25.44%
Commandos
LOJ-1174
Medium
Solved by: 2598
Success rate: 55.61%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1153
Success rate: 34.80%
Escape
LOJ-1185
Medium Hard
Solved by: 551
Success rate: 37.83%
Dangerous Bull! Who Wants to Pull?
LOJ-1208
Hard
Solved by: 79
Success rate: 19.38%
Efficient Traffic System
LOJ-1210
Medium Hard
Solved by: 739
Success rate: 33.54%
Travel Company
LOJ-1221
Medium Hard
Solved by: 436
Success rate: 60.21%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1981
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: 440
Success rate: 39.34%
Prison Break
LOJ-1254
Medium Hard
Solved by: 357
Success rate: 37.19%
Word Puzzle
LOJ-1256
Hard
Solved by: 153
Success rate: 27.83%
Farthest Nodes in a Tree (II)
LOJ-1257
Medium
Solved by: 1604
Success rate: 54.67%
Equalizing Money
LOJ-1263
Medium
Solved by: 1362
Success rate: 45.97%
Better Tour
LOJ-1271
Medium Hard
Solved by: 533
Success rate: 38.66%
New Traffic System
LOJ-1281
Medium Hard
Solved by: 715
Success rate: 36.20%
Real Life Traffic
LOJ-1291
Medium Hard
Solved by: 677
Success rate: 35.42%
Odd Personality
LOJ-1300
Medium Hard
Solved by: 451
Success rate: 32.65%
Ant Network
LOJ-1308
Medium Hard
Solved by: 292
Success rate: 30.69%
A Wedding Party
LOJ-1316
Medium Hard
Solved by: 281
Success rate: 20.39%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 291
Success rate: 52.63%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1515
Success rate: 29.32%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 913
Success rate: 31.46%