随笔分类 -  组合数学-线性递推/打表

二项式定理与杨辉三角
摘要：(a + b)2 = a2 + 2ab + b2 (a + b)3 = a3 + 3a2b + 3ab2 + b3 (a + b)4 = a4 + 4a3b + 6a2b2 + 6ab3 + b4 (a + b)5 = a5 + 5a4b + 10a3b2 + 10a2b3 + 5ab4 + b5 阅读全文
posted @ 2018-03-10 14:00 Roni_i 阅读(1227) 评论(0) 推荐(0) 编辑
Codeforces Round #446 (Div. 2) C. Pride【】
摘要：C. Pride time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output C. Pride time limit per test 2 阅读全文
posted @ 2017-11-24 23:29 Roni_i 阅读(152) 评论(0) 推荐(0) 编辑

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