求大佬帮我看看我的80分屎山代码，9、10WA

#include <iostream>
using namespace std;

bool cmp(int f, int e) {
    int a = f / 1000;
    int b = e % 10;
    if (a != b) {
        return false;
    }
    f %= 1000;
    e /= 10;
    a = f / 100;
    b = e % 10;
    if (a != b) {
        return false;
    }
    f %= 100;
    e /= 10;
    a = f / 10;
    b = e % 10;
    if (a != b) {
        return false;
    }
    f %= 10;
    e /= 10;
    if (f != e) {
        return false;
    }
    return true;
}

int main() {
    int date1;
    int date2;
    cin >> date1 >> date2;
    int ans = 0;
    for (int date  = date1;date <= date2;) {
        int f = date / 10000;
        int e = date % 10000;
        if (cmp(f, e))  ++ans;

        int month = date/100%100;
        int day = date % 100;
        int year = date / 10000;
        ++day;
        switch (month) {
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
            case 1:{
                if (day > 31) {
                    day = 1;
                    ++month;
                    if (month > 12) {
                        month = 1;
                        ++year;
                    }
                }
                break;
            }
            case 2:{ 
                if ((year % 100 == 0 && year % 400 == 0) || (year % 4 == 0 && year % 100 != 0)) {
                    if (day > 29) {
                        ++month;
                        day = 1;
                        break;
                    }
                }
                if (day > 28) {
                    ++month;
                    day = 1;
                }
                break;
            }
            case 4:
            case 6:
            case 9:
            case 11:{
                if (day > 30) {
                    day = 1;
                    ++month;
                }
                break;
            }
        }

        date = year * 10000 + month * 100 + day;

    }
    cout << ans;
    return 0;
}