func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX = 30;   int num[MAX], x[MAX];   char s[1000 + 10];   int main() {     int n;     while (cin >> s >> n) {       int m = n;       string a;       memset(num, 0, sizeof num);       int len = strlen(s), sum = 0;       for (int i = 0; i < len; ++i) {         if (!num[s[i] -  a ]) ++sum;         ++num[s[i] -  a ];       }       if (sum > n)         cout <<  -1 ;       else {         for (int i = 0; i < 26; ++i) {           if (num[i]) {             a += (i +  a );             --m;           }           x[i] = 1;         }         while (m) {           int j = 0;           for (int i = 0; i < 26; ++i) {             if ((num[i] - 1) / x[i] + 1 > (num[j] - 1) / x[j] + 1) j = i;           }           a += (j +  a );           ++x[j];           --m;         }         int j = 0;         for (int i = 0; i < 26; ++i) {           if ((num[i] - 1) / x[i] + 1 > (num[j] - 1) / x[j] + 1) j = i;         }         cout << (num[j] - 1) / x[j] + 1 << endl;         cout << a;       }       cout << endl;     }     return 0;   }   