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: 3110
Success rate: 47.95%
Drunk
LOJ-1003
Medium
Solved by: 1927
Success rate: 28.53%
Back to Underworld
LOJ-1009
Easy
Solved by: 3830
Success rate: 32.61%
Guilty Prince
LOJ-1012
Easy
Solved by: 5308
Success rate: 77.69%
Brush (V)
LOJ-1019
Medium
Solved by: 2349
Success rate: 53.40%
Critical Links
LOJ-1026
Medium
Solved by: 1399
Success rate: 43.72%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1781
Success rate: 62.82%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1422
Success rate: 38.98%
A Toy Company
LOJ-1039
Medium
Solved by: 1116
Success rate: 51.01%
Donation
LOJ-1040
Medium
Solved by: 1352
Success rate: 61.12%
Road Construction
LOJ-1041
Medium
Solved by: 1591
Success rate: 64.23%
Rider
LOJ-1046
Medium
Solved by: 1049
Success rate: 58.42%
One Way Roads
LOJ-1049
Medium
Solved by: 1712
Success rate: 71.98%
Going Together
LOJ-1055
Medium Hard
Solved by: 483
Success rate: 33.03%
Air Ports
LOJ-1059
Medium
Solved by: 1137
Success rate: 46.78%
Ant Hills
LOJ-1063
Medium
Solved by: 1385
Success rate: 50.44%
Gathering Food
LOJ-1066
Medium
Solved by: 1419
Success rate: 42.88%
Extended Traffic
LOJ-1074
Medium
Solved by: 1179
Success rate: 30.87%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 437
Success rate: 43.98%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2844
Success rate: 54.92%
Not the Best
LOJ-1099
Medium
Solved by: 1333
Success rate: 39.86%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 560
Success rate: 28.78%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2088
Success rate: 47.23%
Filling the Regions
LOJ-1115
Hard
Solved by: 203
Success rate: 45.94%
Trail Maintenance
LOJ-1123
Medium
Solved by: 772
Success rate: 33.74%
Number Transformation
LOJ-1141
Medium
Solved by: 1762
Success rate: 34.64%
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: 2585
Success rate: 55.66%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1152
Success rate: 34.87%
Escape
LOJ-1185
Medium Hard
Solved by: 551
Success rate: 37.83%
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: 739
Success rate: 33.54%
Travel Company
LOJ-1221
Medium Hard
Solved by: 424
Success rate: 60.60%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1980
Success rate: 62.28%
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: 1597
Success rate: 54.61%
Equalizing Money
LOJ-1263
Medium
Solved by: 1350
Success rate: 46.03%
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: 674
Success rate: 35.52%
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: 281
Success rate: 20.39%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 290
Success rate: 52.57%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1509
Success rate: 29.27%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 909
Success rate: 31.45%