#include <iostream> using namespace std; bool isLeapYear(int year) { if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) { return true; } return false; } int main() { int f[2][13]={ {0,31,28,31,30,31,30,31,31,30,31,30,31}, {0,31,29,31,30,31,30,31,3...