View Compilation Error

0_0_36836929_10773.cpp: In function 'll query(int, int, int, int)':
0_0_36836929_10773.cpp:50:14: error: 'l' was not declared in this scope
     int mid=(l+r)>>1;
              ^
0_0_36836929_10773.cpp:50:16: error: 'r' was not declared in this scope
     int mid=(l+r)>>1;
                ^
0_0_36836929_10773.cpp: In function 'int main()':
0_0_36836929_10773.cpp:79:33: error: too many arguments to function 'll query(int, int, int, int)'
             ll w=query(i,i,1,n,1);
                                 ^
0_0_36836929_10773.cpp:43:4: note: declared here
 ll query(int L,int R,int pos,int rt)
    ^