#include <iostream> using namespace std; int judge_year(int year){ int count = 0; if(year%4==0&&year%100!=0||year%400==0){ return 1; } else return 0; } int main() { int year,mouth,day; int num1[12]={31,28,31,30,31,30,31,31,30,31,30,31}; int num2[12]={31,29,31,30,31,30,31,31,30,31,30,31...