#include<iostream> using namespace std; bool isLeapYear(int year){ if(year%4==0&&year%100!=0||year%400==0){ return true; }return false; } int daytab[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} }; int main()...