View Compilation Error

0_0_31284545_19923.cpp: In function 'void pd(int, int, int)':
0_0_31284545_19923.cpp:4:15: error: 'l' was not declared in this scope
 # define mid (l+(r-l)/2)
               ^
0_0_31284545_19923.cpp:43:27: note: in expansion of macro 'mid'
     sum[lson]=(LL)tag[x]*(mid-l1+1);
                           ^
0_0_31284545_19923.cpp:4:18: error: 'r' was not declared in this scope
 # define mid (l+(r-l)/2)
                  ^
0_0_31284545_19923.cpp:43:27: note: in expansion of macro 'mid'
     sum[lson]=(LL)tag[x]*(mid-l1+1);
                           ^