82,两个测试点WA

（怎么都是82a）

dalao帮个忙，orz

#include <iostream>
using namespace std;
int month[13] = { 0,1,2,3,4,5,6,7,8,9,10,11,12 };
int day[13] = { 0,31,-1,31,30,31,30,31,30,30,31,30,31 };
int date1, date2;
int cnt;
bool isRun(int year)
{
    return (year % 100 != 0 && year % 4 == 0) || (year % 400 == 0);
}
bool isHui(int num)
{
    if ((num / 10000000 == num % 10) && (num / 1000000 % 10 == num % 100 / 10) && (num / 100000 % 10 == num % 1000 / 100) && (num / 10000 % 10 == num % 10000 / 1000))
    {
        return 1;
    }
    return 0;
}
bool isRight(int date)
{
    int dYear = date / 10000;
    int dMonth = date % 10000 / 100;
    int dDay = date % 100;
    if (!(dMonth >= 1 && dMonth <= 12)) return 0;
    if (dMonth == 2)
    {
        if (isRun(dYear))day[2] = 29;
        else day[2] = 28;
    }
    if (!(dDay >= 1 && dDay <= day[dMonth])) return 0;
    return 1;
}
int main()
{
    cin >> date1 >> date2;
    if (date1 == date2)
    {
        if (isHui(date1))
        {
            cout << 1;
            return 0;
        }
        else
        {
            cout << 0;
            return 0;
        }
    }
    for (int i = date1; i <= date2; i++)
    {
        if (isRight(i) && isHui(i))
        {
            cnt++;
        }
    }
    cout << cnt;
    return 0;
}
//纯暴力毫无技术含量