Encode and Decode Strings--Leetcode

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.

Idea: Add the length of each string before it and a% character.

1 classCodec {2  Public:3 4     //encodes a list of strings to a single string.5     stringEncode (vector<string>&STRs) {6         stringRes;7          for(inti =0; I < strs.size (); i++)8Res + = std::to_string (Strs[i].size ()) +"%"+Strs[i];9         returnRes;Ten     } One  A     //decodes a single string to a list of strings. -vector<string> Decode (strings) { -vector<string>Res; the         intCurind =0; -         intMark = S.find ("%"); -          while(Mark! = std::string:: NPOs) { -             intLen = Std::stoi (S.substr (Curind, Mark-curind)); +             if(len) Res.push_back (S.substr (Mark +1, Len)); -             //In case it's an empty string +             ElseRes.push_back (""); ACurind = Mark + len +1; atMark = S.find ("%", curind); -         } -         returnRes; -     } - }; -  in //Your Codec object would be instantiated and called as such: - //Codec Codec; to //Codec.decode (Codec.encode (STRs));

Encode and Decode Strings--Leetcode