100pts求调（闭关）

#include <bits/stdc++.h>
using namespace std;
long long a, b;

long long n, cnt, y, r, n1, y2, r1, m[50] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
string arr;

bool hw(string wsb) {
    for (int i = 0, j = wsb.size() - 1; i <= j; i++, j--) {
        if (wsb[i] != wsb[j]) {
            return 0;
        }
    }
    return 1;
}

int main() {
    cin >> a >> b;
    n = a / 10000;
    n1 = b / 10000;
    y = a / 100 % 100;
    y2 = b / 100 % 100;
    r = a % 100;
    r1 = b % 100;

    cnt = 0;

    for (int i = n; i <= n1; i++) {
        if ((i % 4 == 0 && i % 100 != 0) || (i % 400 == 0)) {
            m[2] = 29;
        } else {
            m[2] = 28;
        }

        for (int j = 1; j <= 12; j++) {
            for (int k = 1; k <= m[j]; k++) {
                string year, month, day, arr;
                if (i < 10) year = "000" + to_string(i);
                else if (i < 100) year = "00" + to_string(i);
                else if (i < 1000) year = "0" + to_string(i);
                else year = to_string(i);

                if (j < 10) month = "0" + to_string(j);
                else month = to_string(j);

                if (k < 10) day = "0" + to_string(k);
                else day = to_string(k);

                arr = year + month + day;

                if (hw(arr)) {
                    cnt++;
                }
            }
        }
    }

    cout << cnt << endl;
    return 0;
}