HDU-1005 Number Sequence
Description A number sequence is defined as follows: \( f(1) = 1 \) \( f(2) = 1 \) \( f(n) = (A * f(n - 1) + B * f(n - 2)) \%7 \) Given A, B, and n, you are to calculate the value of\( f(n) \). ...
Description A number sequence is defined as follows: \( f(1) = 1 \) \( f(2) = 1 \) \( f(n) = (A * f(n - 1) + B * f(n - 2)) \%7 \) Given A, B, and n, you are to calculate the value of\( f(n) \). ...
这个求法其实是组合数的来源 伟大的古代劳动人民智慧的结晶 杨辉三角 大家可以观察这个杨辉三角 $$1$$ $$1\ 1$$ $$1\ 2\ 1$$ $$1\ 3\ 3\ 1$$ $$1\ 4\ 6\ 4\ 1$$ $$1\ 5\ 10\ 10\ 5\ 1$$ $$...