View Compilation Error

0_0_29106396_4655.cpp:37:9: error: 'LL' was not declared in this scope
 ll Sqrt(LL a, LL b){    //欧几里得距离平方
         ^
0_0_29106396_4655.cpp:37:15: error: 'LL' was not declared in this scope
 ll Sqrt(LL a, LL b){    //欧几里得距离平方
               ^
0_0_29106396_4655.cpp:37:19: error: expression list treated as compound expression in initializer [-fpermissive]
 ll Sqrt(LL a, LL b){    //欧几里得距离平方
                   ^
0_0_29106396_4655.cpp:37:20: error: expected ',' or ';' before '{' token
 ll Sqrt(LL a, LL b){    //欧几里得距离平方
                    ^
0_0_29106396_4655.cpp: In function 'void Query(Node, int, int, int)':
0_0_29106396_4655.cpp:61:68: error: 'Sqrt' cannot be used as a function
         cur.first += Sqrt((ll)data[rt].feature[i], (ll)p.feature[i]);
                                                                    ^
0_0_29106396_4655.cpp:87:62: error: 'Sqrt' cannot be used as a function
         if(Sqrt((ll)p.feature[dim], (ll)data[rt].feature[dim]) < Q.top().first)
                                                              ^