func_code_string: #include <bits/stdc++.h>   using namespace std;   char s[110000];   char res[110000];   int main() {     scanf( %s , s);     int resLen = 0;     int last = 0;     int index = 0;     for (int i = 0; i < 110000; i++) res[i] = 0;     for (char c =  z ; c >=  a ; c--)       for (int i = index; s[i]; i++)         if (s[i] == c) {           res[resLen] = c;           resLen++;           index = i + 1;         }     printf( %s n , res);     return 0;   }   