func_code_string: #include <bits/stdc++.h>   using namespace std;   void setIO() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);   }   const long double PI = 4 * atan((long double)1);   const int INF = 1e9 + 7;   const long long _INF = 1e18;   int main() {     setIO();     int t;     cin >> t;     while (t--) {       int x, k = 0;       cin >> x;       int y = x;       while (y) {         y /= 10;         k++;       }       cout << 10 * (x % 10 - 1) + k * (k + 1) / 2 << endl;     }   }   