CodeLearn B

var outtemp = ""; var outtemp2 = [];
//longestWordChain(["java", "python", "angualar", "r", "ruby"], "angualar");
function longestWordChain(keywords, startWord){
    var check = false;
    var chuoihientai = startWord;
    for(var i = 0;i < keywords.length;i++){
        if(startWord[startWord.length -1] == keywords[i][0]  && chuoihientai.split("-").indexOf(keywords[i]) == -1){
            dequytimchu(chuoihientai + "-" + keywords[i],keywords[i],keywords);
            check = true;
        }
    }
    if(!check){
        return startWord;
    }
    if(outtemp2.length == 1){
      return outtemp2[0];
    }
    var checklength = "";
    for(var i = 0;i<outtemp2.length-1;i++){
      if(outtemp2[i].split("-").length > outtemp2[i+1].split("-").length){
        checklength =  outtemp2[i];
      }else{
        checklength =  outtemp2[i+1];
      }
    }
    var c = 0;
    for(var i = 0;i<outtemp2.length;i++){
      if(checklength.split("-").length == outtemp2[i].split("-").length && checklength != outtemp2[i+1]){
        c++;
      }
    }

    if(c == 1){
      return checklength;
    }
    var outtemp3 = [];var checkdodai = 0;
    for(var i = 0;i<outtemp2.length;i++){
      if(outtemp2[i].split("-").length >= checkdodai){
        checkdodai = outtemp2[i].split("-").length;
      }
    }
     for(var i = 0;i<outtemp2.length;i++){
      if(outtemp2[i].split("-").length == checkdodai){
        outtemp3.push(outtemp2[i]);
      }
    }
    outtemp3.sort();
    return outtemp3;
}
function dequytimchu(chuoihientai,tutieptheo,keywords){
    var check = false;
    for(var i = 0;i < keywords.length;i++){

        if(tutieptheo[tutieptheo.length -1] == keywords[i][0] && keywords[i] != tutieptheo && chuoihientai.split("-").indexOf(keywords[i]) == -1){
            dequytimchu(chuoihientai +"-"+keywords[i],keywords[i],keywords);
        }
    }
    if(outtemp.length <= chuoihientai.length){
            outtemp = chuoihientai;
            outtemp2.push(chuoihientai);
    }
}