View Compilation Error

0_0_25728478_7719.cpp: In function 'void update(int, int, long long int, int, int, int)':
0_0_25728478_7719.cpp:3:18: error: 'rt' was not declared in this scope
 #define lson l,m,rt<<1
                  ^
0_0_25728478_7719.cpp:36:20: note: in expansion of macro 'lson'
     update(L,R,val,lson);
                    ^
0_0_25728478_7719.cpp: In function 'long long int query(int, int, int, int, int)':
0_0_25728478_7719.cpp:3:18: error: 'rt' was not declared in this scope
 #define lson l,m,rt<<1
                  ^
0_0_25728478_7719.cpp:48:23: note: in expansion of macro 'lson'
         ans=query(L,R,lson);
                       ^
0_0_25728478_7719.cpp:4:20: error: 'rt' was not declared in this scope
 #define rson m+1,r,rt<<1|1
                    ^
0_0_25728478_7719.cpp:50:23: note: in expansion of macro 'rson'
         ans=query(L,R,rson);
                       ^