func_code_string: #include <bits/stdc++.h>   int main() {     int n;     char a[20];     scanf(  %d , &n);     scanf(  %s , a);     char num[10];     for (int i = 2; i < 10; i++) {       int c = 0;       for (int j = 0; a[j]; j++)         if (a[j] >= i +  0 ) c++;       num[i] = c;     }     if (num[7] > 0) {       for (int i = 2; i < 7; i++) {         num[i] -= num[7];       }       while (num[7]--) printf( 7 );     }     if (num[5] > 0) {       for (int i = 2; i < 5; i++) {         num[i] -= num[5];       }       while (num[5]--) printf( 5 );     }     num[3] += num[6];     num[3] += num[9] * 2;     num[2] += num[6];     num[2] += num[4] * 2;     num[2] += num[8] * 3;     num[2] -= num[3];     while (num[3]--) printf( 3 );     while (num[2]--) printf( 2 );     printf(  n );     return 0;   }   