func_code_string: #include <bits/stdc++.h>   using namespace std;   long long f(long long x) {     long long ans = x;     while (ans) {       x *= 10;       x += (ans % 10);       ans /= 10;     }     return x;   }   int main() {     long long k, p;     cin >> k;     cin >> p;     long long sum = 0;     for (long long i = 1; i <= k; i++) sum += f(i);     sum %= p;     cout << sum << endl;     return 0;   }   