Main.java:13: error: cannot find symbol
    	if(list.length == k){
    	       ^
  symbol:   variable length
  location: variable list of type List<Integer>
Main.java:17: error: cannot find symbol
      if(list.length +n-cur<k){
             ^
  symbol:   variable length
  location: variable list of type List<Integer>
Main.java:21: error: method dfs in class Main cannot be applied to given types;
      dfs(n,k,cur+1);
      ^
  required: int,int,int,List<Integer>
  found:    int,int,int
  reason: actual and formal argument lists differ in length
Main.java:22: error: cannot find symbol
      list.remove(list.length - 1);
                      ^
  symbol:   variable length
  location: variable list of type List<Integer>
Main.java:23: error: method dfs in class Main cannot be applied to given types;
      dfs(n,k,cur+1); 
      ^
  required: int,int,int,List<Integer>
  found:    int,int,int
  reason: actual and formal argument lists differ in length
5 errors