摘要：DescriptionAn important topic nowadays in computer science is cryptography. Some people even think that cryptography is the only important fie... 阅读全文

摘要：DescriptionGiven a n × n matrix A and a positive integer k, find the sum S=A+A2+A3+…+Ak.InputThe input contains exactly one test case. The fir... 阅读全文

摘要：DescriptionIn the Fibonacci integer sequence, F0 = 0, F1 = 1, and Fn = Fn − 1 + Fn − 2 for n ≥ 2. For example, the first ten terms of the Fibo... 阅读全文