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

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