#include <bits/stdc++.h> using namespace std; bool run(int year){ if(year % 4 == 0 and year % 100 !=0 or year % 400 == 0) return true; else return false; } int main(){ int year,month,day; int months[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; while(cin >> year &...