#include <bits/stdc++.h> #define MAX 20 using namespace std; int a1[13] = {0,31,28,31,30,31,30,31,31,30,31,30}; int a2[13] = {0,31,29,31,30,31,30,31,31,30,31,30}; bool isrun(int y){ if((y % 4 == 0 && y % 100 != 0) || (y % 400 == 0)) return true; else return false; } int main(){ int ...