#include <iostream> #include <cstdio> using namespace std; int years[2][13] = { {0,31,28,31,30,31,30,31,31,30,31,30,31}, {0,31,29,31,30,31,30,31,31,30,31,30,31} }; bool IsLeapYear(int year) { return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); } int NumberOfYear...