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pigeonhole principle
stresses
math.
принцип Дирихле
(
Stella70
)
tech.
принцип Дирихле
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MichaelBurov
)
;
принцип ящиков
(
MichaelBurov
)
;
принцип ящиков Дирихле
(
MichaelBurov
)
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