下面代码有问题吗？

// 伊甸园日历游戏
#include <bits/stdc++.h>
using namespace std;

bool judgeLeap(int year)
{
    if(year % 100 == 0)
    {
        if(year % 400 == 0)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    else
    {
        if(year % 4 == 0)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    return false;
}

bool getRightWay(int year,int mouth,int day,bool leap)
{
    if(mouth < 1 || day < 1)
    {
        return false;
    }
    if(year > 2001 || year < 1900)
    {
        return false;
    }
    else if(year == 2001)
    {
        if(mouth > 11)
        {
            return false;
        }   
        else if(mouth  == 11)
        {
            if(day > 4)
            {
                return false;
            }
        }
    }
    if(leap == true)
    {
        if(mouth == 2)
        {
            if(day > 29)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
    }
    else if(leap == false)
    {
        if(mouth == 2)
        {
            if(day > 28)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
    }
    return true;
}

string getWinWay(int mouth,int day)
{
    if(mouth == 9 && day == 30)
    {
        return "YES";
    }
    if(mouth == 11 && day == 30)
    {
        return "YES";
    }
    int a = mouth + day;
    if(a % 2 == 0)
    {
        return "YES";
    }
    else 
    {
        return "NO";
    }
}

int main()
{
    int num;
    cin >> num;
    int year[num],mouth[num],day[num];
    bool leap[num]; 
    for(int i = 0;i < num;i++)
    {
        cin >> year[i] >> mouth[i] >> day[i];
        leap[i] = judgeLeap(year[i]);
        bool a = getRightWay(year[i],mouth[i],day[i],leap[i]);
        if(a == false)
        {
            return 0;
        }
    }
    for(int i = 0;i < num;i++)
    {
        cout << getWinWay(mouth[i],day[i]) << endl;
    }
    return 0;
}