func_code_string: #include <bits/stdc++.h>   int product(long long a) {     int maxi = 0, mini = 9, x, ans;     long long temp = a;     while (temp) {       x = temp % 10;       if (x < mini) mini = x;       if (x > maxi) maxi = x;       temp /= 10;     }     if (mini == 0) return 0;     ans = mini * maxi;     return ans;   }   using namespace std;   int main() {     ios_base::sync_with_stdio(NULL);     cin.tie(0);     cout.tie(0);     long long a, k, ans;     int t;     cin >> t;     while (t--) {       cin >> a >> k;       k--;       while (k--) {         if (product(a) == 0)           break;         else {           a += product(a);         }       }       cout << a <<   n ;     }     return 0;   }   