Nice YAK, the complexity just on the two stars. Everything can be solved logically, and even though some times you need to use the method of "contradiction", no killer-desperate difficulties ;)
Curta 0 1
belko61
2018-11-19 23:32
0
А если решать без метода "от противного", то там все положенные три звезды и море удовольствия от ломки мозга;)))
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