func_code_string: #include <bits/stdc++.h>   using namespace std;   int32_t main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long l, r;     cin >> l >> r;     long long temp = r;     long long num = 1, ans = 1;     while (temp) {       temp /= 10;       num *= 10;     }     num--;     long long left_lim = (num) / 10;     long long mid = (num + 1) / 2;     if (r <= mid) {       ans = (num - r) * r;     } else {       if (l <= mid) {         ans = (num - mid) * (mid);       } else {         ans = (num - l) * l;       }     }     cout << ans <<   n ;     return 0;   }   