Move hash to front

Move Hash to Front

You have write a function that accepts, a string which length is “len”, the string has some “#”, in it you have to move all the hashes to the front of the string and return the whole string back and print it.

Input :
Move#Hash#to#Front
Output :
###MoveHashtoFront

Following is sample CPP code.

#include <iostream>
using namespace std;
int main() 
{
  string s;
  cin>>s;
  string ans="";
  for(auto i:s){
    if(i=='#'){
      ans='#'+ans;
    }
    else{
      ans+=i;
    }
  }
  cout<<ans;
}