#include <bits/stdc++.h> using namespace std; bool isrun(int n) { if ((n % 4 == 0 && n % 100 != 0) || n % 400 == 0) return true; else return false; } int main() { int m, n, i; int a1[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; int a2[] = {0, 31, 29, 3...