摘要：Ancient Roman empire had a strong government system with various departments, including a secret service department. Important documents were sent bet 阅读全文

摘要：Building designing An architect wants to design a very high building. The building will consist of some floors, and each floor has a certain size. The 阅读全文

摘要：#include <cstdio> #include <cstring> #include <iostream> using namespace std; int main() { int arry[31] = {1}; int now = 1; for(int i = 1; i <= 30; ++ 阅读全文

摘要：A regular palindrome is a string of numbers or letters that is the same forward as backward. For example, the string "ABCDEDCBA" is a palindrome becau 阅读全文