Main.java:14: error: non-static variable ans cannot be referenced from a static context
        return ans;
               ^
Main.java:17: error: non-static variable temp cannot be referenced from a static context
    	if(temp.size() == k){
    	   ^
Main.java:18: error: non-static variable ans cannot be referenced from a static context
        	ans.add(new ArrayList<>(temp));
        	^
Main.java:18: error: non-static variable temp cannot be referenced from a static context
        	ans.add(new ArrayList<>(temp));
        	                        ^
Main.java:21: error: non-static variable temp cannot be referenced from a static context
        if(temp.size() + n -cur+1<k){
           ^
Main.java:24: error: non-static variable temp cannot be referenced from a static context
        temp.add(cur);
        ^
Main.java:26: error: non-static variable temp cannot be referenced from a static context
        temp.remove(temp.size()-1);
                    ^
Main.java:26: error: non-static variable temp cannot be referenced from a static context
        temp.remove(temp.size()-1);
        ^
8 errors