./Main.java:34: error: cannot find symbol
		for (int i:po1){
		           ^
  symbol:   variable po1
  location: class Main
./Main.java:35: error: cannot find symbol
			for (int j:po2){
			           ^
  symbol:   variable po2
  location: class Main
./Main.java:64: error: non-static method getHash(long,long,long,long) cannot be referenced from a static context
				String hash=getHash(pos[i][0],pos[i][1],pos[i][2],r);
				            ^
./Main.java:65: error: cannot find symbol
				if (!blockHash.contains(hash)){
				              ^
  symbol:   method contains(String)
  location: variable blockHash of type Map<String,Integer>
./Main.java:90: error: non-static method getHash(long,long,long,long) cannot be referenced from a static context
							String sk=getHash(x+x1,y+y1,z+z1,r);
							          ^
./Main.java:92: error: non-static method checkPoint(List<Integer>,List<Integer>,long[][],long) cannot be referenced from a static context
								if (checkPoint(pointList.get(key),pointList.get(sk),pos,r)){
								    ^
6 errors

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