Problems from KTH Training

Languages
A Vicious Pikeman (Easy)0.001274408149334%3.0Mediumen
A Vicious Pikeman (Hard)0.01462231936016%8.5Harden
Book Circle0.0160981625131%5.7Harden
Boom!0.092986540448%9.0Harden
Bus Numbers0.008816613668940%2.6Easyen
Coloring Socks0.01877439238932%2.5Easyen
Cyclic Sightseeing0.00733641930%7.2Harden
Dangerous Skiing0.027024866714%8.8Harden
Disastrous Downfall0.1546524411447%4.3Mediumen
Emergency Contest Running0.0045322378224%4.1Mediumen
Exploding Batteries0.0044160549631%3.8Mediumen
Falling Snow0.018494045915%6.8Harden
Fancy Fence0.1310262577228%9.1Harden
Fancy Fence (easy)0.0110421665936%7.2Harden
Fruit Baskets0.00996468163625%4.5Mediumen
Goofy Geometry0.0020579021227%5.1Mediumen
Just a Minute0.00846301276244%1.9Easyen
Mårten's Theorem0.02889121427723%6.8Harden
Paint Buckets0.094501717544%4.7Mediumen
Paul Eigon0.00595779286150%1.8Easyen
Polly Gone0.00500100020621%6.3Harden
Reactivity Series0.01479217272934%3.5Mediumen
Santa Klas0.0054251986534%3.0Mediumen
Shovelling Snow0.011923127713711%8.1Harden
Solving for Carrots0.009530423277162%1.3Easyen
Speaking of Which0.002205128416%6.6Harden
Teacher Evaluation0.0087178458833%3.1Mediumen
Tomography0.00273222357226%4.3Mediumen
Triforce0.00206782836%7.2Harden
X-ray spectrum0.005312365423%6.6Harden