【BISHI11】变幻莫测

求解代码

publicstaticvoidmain(String[]args)throwsIOException{BufferedReaderbr=newBufferedReader(newInputStreamReader(System.in));StringTokenizerin=newStringTokenizer(br.readLine());PrintWriterout=newPrintWriter(newOutputStreamWriter(System.out));longx=Long.parseLong(in.nextToken());longy=Long.parseLong(in.nextToken());if(x==y){out.println(0);}elseif(y==0){// 第二个数为0，1步操作即可满足条件out.println(1);}elseif(x==0){// 第一个数为0，2步操作即可满足条件out.println(2);}elseif(x+y==0){// 两数互为相反数（y = -x），3步操作满足条件out.println(3);}else{out.println(-1);}out.flush();out.close();br.close();}