70.0分求调

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;
}