func_code_string: #include <bits/stdc++.h>   using namespace std;   int countDigit(long long n) {     int count = 0;     while (n != 0) {       n = n / 10;       ++count;     }     return count;   }   int main() {     long long int t;     cin >> t;     while (t--) {       int k, s;       cin >> s;       int n = s % 10, ans;       k = countDigit(s);       ans = ((n - 1) * 10) + ((k * (k + 1)) / 2);       cout << ans << endl;     }   }   