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Problems

Graphs
Difficulty
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2480
Hamiltonian cycle in a complete graph
Medium
2481
Linear Device
Very hard
2482
Prune
Medium
2487
Jealous Queen
Very hard
2505
Tea Party
Very easy
2530
Traveling Queen Problem
Very hard
2531
Mine Map
2533
Honeymoon Hike
Very easy
2543
Cracking Tree Codes
Medium
2554
Magic Square
Medium
2556
Space competition
2558
Serial Numbers
2561
Safety Grade
Medium
2567
Road Planner
Very hard
2569
Painting
Hard
2576
G. tourist
Hard
2587
Traffic Lights
Hard
2590
Space Exploration
2605
Hexagonal Pasture Network
2621
Kings Tour
Very easy
2622
Reliable Nets
Very easy
2627
Two Longest Paths
2632
Attention!
Very easy
2635
Detonating cord
Very easy
2636
Lambda-plant
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