不懂哪里错了（是样例太水？）

#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll a,b;
struct date
{
	ll year;
	ll month;
	ll day;
};
date tmp,goal;
ll num[1000010];
ll cc;
ll md[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
date sepdt(ll edon)
{
	date a;
	a.day=edon%100;
	edon/=100;
	a.month=edon%100;
	edon/=100;
	a.year=edon;
	return a;
}
ll tdpes(date node)
{
	ll a;
	a+=node.year;
	a*=100;
	a+=node.month;
	a*=100;
	a+=node.day;
	return a;
}
bool ech(ll y)
{
	if (y%400==0)
	{
		return true;
	}
	if (y%100==0)
	{
		return false;
	}
	if (y%4==0)
	{
		return true;
	}
	return false;
}
bool orz(ll x,ll cnt)
{
	ll c=x;
	for (ll i=1;i<=cnt;i++)
	{
		num[i]=c%10;
		c/=10;
	}
	for (ll i=1,j=cnt;i<j;i++,j--)
	{
		if (num[i]!=num[j])
		{
			return false;
		}
	}
	return true;	
}

int main()
{
	cin>>a>>b;
	tmp=sepdt(a);
	goal=sepdt(b);
	while (tmp.day<goal.day||tmp.month<goal.month||tmp.year<goal.year)
	{
		ll ans;
		if (ech(tmp.year))
		{
			md[2]=29;
		}
		else
		{
			md[2]=28;
		}
		if (tmp.day>md[tmp.month])
		{
			tmp.day=1;
			tmp.month++;
		}
		if (tmp.month>12)
		{
			tmp.year++;
			tmp.month=1;
			tmp.day=1;
		}
		ans=tdpes(tmp);
		if (orz(ans,8))
		{
			cc++;
		}
		tmp.day++;
	}
	cout<<cc;
	return 0;
}