#include<stdio.h> #include<math.h> int ret_day(int year,int month) {switch(month)     {         case 1:case 3:case 5:case 7:case 8:case 10:case 12:             return 31;    &nbs...

#include <stdio.h> int CalDay(int y,int m,int d) { int i,a[12] = {31,28,31,30,31,30,31,31,30,31,30,31},sum = 0; if(y % 400 == 0 || (y % 100 != 0 && y % 4 == 0)) a[1] = 29; for(i = 0; i < m-1; i++) sum += a[i]; return sum+d; } int main() { int n,i; whi...

#include<iostream> using namespace std; int days[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; bool add_day(int y) { if (y%400 == 0) return true; else if (y%100 != 0 && y%4 == 0) return true; else return false; } int main() { int n; cin >>...