max no of 6 pieces crosses in a 6x11 sheet of paper
Source: Czech-Polish-Slovak Match Junior 2021, individual p3 CPSJ
September 12, 2021
combinatoricscombinatorial geometry
Problem Statement
A cross is the figure composed of unit squares shown below (and any figure made of it by rotation).
https://cdn.artofproblemsolving.com/attachments/6/0/6d4e0579d2e4c4fa67fd1219837576189ec9cb.png
Find the greatest number of crosses that can be cut from a divided sheet of paper into unit squares (in such a way that each cross consists of six such squares).