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: 3067
Success rate: 47.82%
Drunk
LOJ-1003
Medium
Solved by: 1881
Success rate: 28.33%
Back to Underworld
LOJ-1009
Easy
Solved by: 3773
Success rate: 32.53%
Guilty Prince
LOJ-1012
Easy
Solved by: 5217
Success rate: 77.48%
Brush (V)
LOJ-1019
Medium
Solved by: 2321
Success rate: 53.25%
Critical Links
LOJ-1026
Medium
Solved by: 1388
Success rate: 43.83%
Civil and Evil Engineer
LOJ-1029
Medium
Solved by: 1761
Success rate: 62.65%
Hit the Light Switches
LOJ-1034
Medium
Solved by: 1407
Success rate: 38.97%
A Toy Company
LOJ-1039
Medium
Solved by: 1102
Success rate: 50.92%
Donation
LOJ-1040
Medium
Solved by: 1341
Success rate: 61.12%
Road Construction
LOJ-1041
Medium
Solved by: 1572
Success rate: 64.02%
Rider
LOJ-1046
Medium
Solved by: 1038
Success rate: 58.27%
One Way Roads
LOJ-1049
Medium
Solved by: 1694
Success rate: 72.07%
Going Together
LOJ-1055
Medium Hard
Solved by: 479
Success rate: 33.65%
Air Ports
LOJ-1059
Medium
Solved by: 1129
Success rate: 46.69%
Ant Hills
LOJ-1063
Medium
Solved by: 1376
Success rate: 50.45%
Gathering Food
LOJ-1066
Medium
Solved by: 1398
Success rate: 42.93%
Extended Traffic
LOJ-1074
Medium
Solved by: 1159
Success rate: 30.77%
Jogging Trails
LOJ-1086
Medium Hard
Solved by: 433
Success rate: 43.97%
Farthest Nodes in a Tree
LOJ-1094
Easy
Solved by: 2796
Success rate: 54.79%
Not the Best
LOJ-1099
Medium
Solved by: 1303
Success rate: 39.71%
Instant View of Big Bang
LOJ-1108
Medium Hard
Solved by: 553
Success rate: 28.90%
Best Picnic Ever
LOJ-1111
Medium
Solved by: 2056
Success rate: 47.13%
Filling the Regions
LOJ-1115
Hard
Solved by: 202
Success rate: 45.79%
Trail Maintenance
LOJ-1123
Medium
Solved by: 768
Success rate: 33.75%
Number Transformation
LOJ-1141
Medium
Solved by: 1740
Success rate: 34.68%
Digit Dancing
LOJ-1165
Hard
Solved by: 174
Success rate: 43.18%
Wishing Snake
LOJ-1168
Medium Hard
Solved by: 455
Success rate: 25.44%
Commandos
LOJ-1174
Medium
Solved by: 2539
Success rate: 55.64%
Jane and the Frost Giants
LOJ-1175
Medium
Solved by: 1137
Success rate: 34.74%
Escape
LOJ-1185
Medium Hard
Solved by: 549
Success rate: 38.00%
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: 33.54%
Travel Company
LOJ-1221
Medium Hard
Solved by: 414
Success rate: 60.34%
Power Puff Girls
LOJ-1238
Medium
Solved by: 1958
Success rate: 62.27%
Village Postman
LOJ-1250
Hard
Solved by: 66
Success rate: 33.00%
Forming the Council
LOJ-1251
Medium Hard
Solved by: 437
Success rate: 39.26%
Prison Break
LOJ-1254
Medium Hard
Solved by: 356
Success rate: 37.12%
Word Puzzle
LOJ-1256
Hard
Solved by: 153
Success rate: 27.83%
Farthest Nodes in a Tree (II)
LOJ-1257
Medium
Solved by: 1576
Success rate: 54.57%
Equalizing Money
LOJ-1263
Medium
Solved by: 1312
Success rate: 46.20%
Better Tour
LOJ-1271
Medium Hard
Solved by: 532
Success rate: 38.65%
New Traffic System
LOJ-1281
Medium Hard
Solved by: 710
Success rate: 36.04%
Real Life Traffic
LOJ-1291
Medium Hard
Solved by: 668
Success rate: 35.89%
Odd Personality
LOJ-1300
Medium Hard
Solved by: 451
Success rate: 33.03%
Ant Network
LOJ-1308
Medium Hard
Solved by: 288
Success rate: 30.92%
A Wedding Party
LOJ-1316
Medium Hard
Solved by: 278
Success rate: 20.37%
Sending Packets
LOJ-1321
Medium Hard
Solved by: 289
Success rate: 52.52%
The Crystal Maze
LOJ-1337
Medium
Solved by: 1491
Success rate: 29.10%
Aladdin and the Return Journey
LOJ-1348
Medium
Solved by: 894
Success rate: 31.50%