271. Encode and Decode Strings

Design a algorithm to encode a list of strings to a string. The encoded string is then sent over the network and are decoded back to the original list of strings.

Machine 1 (sender) has the function:

String encode (vector<string> STRs) {  //... your code  return encoded_string;}

Machine 2 (receiver) has the function:

Vector<string> decode (string s) {  //... your code  return strs;}

So machine 1 does:

String encoded_string = Encode (STRs);

and Machine 2 does:

Vector<string> strs2 = decode (encoded_string);

strs2In Machine 2 should is the same as in Machine strs 1.

Implement the encode and decode methods.

Note:

• The string may contain any possible characters out of the valid ASCII characters. Your algorithm should is generalized enough to work on any possible characters.
• Don't use the class member/global/static variables to store states. Your encode and decode algorithms should be stateless.
• Rely on any library method such as eval or Serialize methods. You should implement your own Encode/decode algorithm.

classCodec { Public:    //encodes a list of strings to a single string.    stringEncode (vector<string>&STRs) {        stringRes;  for(Auto Str:strs) res+=to_string (Str.size ()) +"@"+str; returnRes; }    //decodes a single string to a list of strings.vector<string> Decode (strings) {vector<string>Res; intHead =0;  while(head<s.size ()) {            intpos = S.find ("@", head); intLen = Stoll (S.substr (head,pos-head)); stringstr = S.SUBSTR (pos+1, Len);            Res.push_back (str); Head= pos+1+Len; }        returnRes; }};//Your Codec object would be instantiated and called as such://Codec Codec;//Codec.decode (Codec.encode (STRs));

271. Encode and Decode Strings