func_code_string: #include <bits/stdc++.h>   using namespace std;   int k, m;   set<int> S;   int pw[10];   void rec(int ind, int number, int value) {     if (ind == 4) {       if (value > k && value - k < 10000) {         S.insert(number * 10000 + (value - k));       }       if (k >= value && k - value < 10000) {         S.insert(number * 10000 + (k - value));       }       return;     }     for (int i = 1; i + ind < 5; i++) {       for (int j = 0; j < pw[i]; j++) {         if (ind == 0) {           rec(ind + i, j, j);         } else {           rec(ind + i, number * pw[i] + j, value + j);           rec(ind + i, number * pw[i] + j, value - j);           rec(ind + i, number * pw[i] + j, value * j);         }       }     }   }   int main() {     scanf( %d , &k);     scanf( %d , &m);     pw[0] = 1;     for (int i = 1; i <= 6; i++) pw[i] = pw[i - 1] * 10;     rec(0, 0, 0);     for (set<int>::iterator it = S.begin(); (it != S.end()) && m; it++, m--) {       cout << setw(8) << setfill( 0 ) << (*it) << endl;     }     return 0;   }   