46分疑惑

#include <bits/stdc++.h>
bool runnian(int date){
    int year = date/10000;
    if((year%4==0&&year%100!=0)||(year%400==0)){
        return true;    
    }else return false;
} 
bool huiwenshu(int date){
    int temp = date,ans=0;
    while(temp>0){
        ans = ans*10+temp%10;
        temp/=10;
    }
    if(ans==date) return true;
    else return false;
}
bool riqi(int date){
    int year = date/10000;
    int month = (date/100)%100;
    int day = date%100;
    bool b_month = false;
    bool b_day = false;
    if(month>=1&&month<=12) b_month = true;
    switch(month){
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:{
            if(day==31) b_day = true;
            break;
        }
        case 4:
        case 6:
        case 9:
        case 11:{
            if(day==30) b_day = true;
            break;
        } 
        case 2:{
            if(runnian(year)){
                if(day==29) b_day = true;

            }else{
                if(day==28) b_day = true;
            }
            break;
        }
    }
    if(b_month&&b_day) return true;
    else return false;
}
using namespace std;
int main()
{
    int date1,date2,sum=0;
    cin>>date1>>date2;
    for(int i=date1;i<=date2;i++){
        if(riqi(i)&&huiwenshu(i)) sum++;
    }
    cout<<sum<<endl;
    return 0;
}