func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     int arr[4] = {1, 3, 6, 10};     while (t--) {       int x;       cin >> x;       int num1 = x % 10;       int num2 = 0;       while (x != 0) {         x = x / 10;         num2++;       }       cout << (num1 - 1) * 10 + arr[num2 - 1] <<   n ;     }     return 0;   }   