Algorithm

Skiil_Trees.js

function solution(skill, skill_trees){
    var answer = 0;
    var compare1 = "", compare2 = "";
  
    for(var i = 0; i < skill_trees.length; i++){
      var startIndex = 0;
      var flag = true;
      
      for(var j = 0; j < skill_trees[i].length; j++){
        for(var idx = startIndex; idx < skill.length; idx++){
          compare1 = skill.charAt(idx);
          compare2 = skill_trees[i].charAt(j);
          
          if(compare1 == compare2){
            if(idx != startIndex){
              flag = false;
            }
            else{
              startIndex++;
              break;
            }
          }
        }
      }
      if(flag) answer++;
    }
  return answer;
}