0
0
水*n n=99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
0
0
0
0
0
??????????????????????????????????????????????
??????????????????????????????????????????????
??????????????????????????????????????????????
??????????????????????????????????????????????
??????????????????????????????????????????????
??????????????????????????????????????????????
??????????????????????????????????????????????
??????????????????????????????????????????????
0
0
0
0
0
0
0
0