Editorial for DMOPC '14 Contest 6 P5 - Planning
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
Author:
With Hankel determinants of the large and small Schröder numbers, you can obtain a bijection between non-intersecting lattice paths and number of subway maps. The implementation is therefore left as an exercise to the reader.
Time Complexity:
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