Problems from KTH Challenge 2015

Name
Fastest
Shortest
Authors
Full Solves
Ratio
Difficulty
Languages
A1 Paper0.00983093239978%4.4Mediumen
Black Friday0.00824983443189%1.7Easyen
Odd Binomial Coefficients0.005557048886%3.5Mediumen
Proteins0.015261017978%5.5Harden
Shibuya Crossing0.0040721314669%5.9Harden
The Addition Game0.001216652640%8.8Harden
Xortris0.004521259374%7.2Harden