2730脑筋急转弯困难derivationlong
Submultisets With Size Divisible by Three
题目
From the multiset {a,a,a,b,b,c,c,c,c}, you may choose any submultiset. How many choices have total size divisible by 3?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案
题目
From the multiset {a,a,a,b,b,c,c,c,c}, you may choose any submultiset. How many choices have total size divisible by 3?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案