Correct date (please help) c++

Question

Given three natural numbers a, b, c which represent the day, month and year of some date. Output “yes" if the given date is correct and “no” otherwise.

Example:
Input:
32 1 1991

Output
no

What is wrong?
#include <iostream>

using namespace std ;

int main()
{
int day, month, year;

cin >> day >> month >>year;
if(month > 12) cout << "no";
if(!(month%2))
{
if(day > 30) cout<< "no";
}
else
if(day > 31) cout << "no";

if(month == 2)
{
if(year%4)
{
if(day > 28) cout << "no";
}
else
if(day > 29) cout << "no";
}

else {
cout <<"Yes";}

return 0;
}