救命啊70pts

C++ Code

#include<bits/stdc++.h>
using namespace std;
bool pal(unsigned long long x)
{
    string s1=to_string(x);
    string s2=s1;
    reverse(s2.begin(),s2.end());
    return s1==s2;
}
unsigned long long day[14]={0,31,0,31,30,31,30,31,31,30,31,30,31};
bool truetime(unsigned long long x)
{
    unsigned long long y=x/10000;
    unsigned long long m=(x-10000*y)/100;
    unsigned long long d=x-y*10000-m*100;
    if(m*100+d==229)
    {
        return true;
    }
    if(d>day[m])
    {
        return false;
    }
    else
    {
        return true;
    }
}
int main()
{
    unsigned long long start;
    cin>>start;
    unsigned long long end;
    cin>>end;
    unsigned long long cnt=0;
    for(unsigned long long i=start;i<=end;i++)
    {
        if(pal(i)&&truetime(i))
        {
            cnt++;
        }
    }
    cout<<cnt<<endl;
    return 0;
}