View Compilation Error

0_0_19603850_25071.cpp:3:4: error: stray '#' in program
  3 #define lson l, m, root<<1
    ^
0_0_19603850_25071.cpp:4:4: error: stray '#' in program
  4 #define rson m+1, r, root<<1|1
    ^
0_0_19603850_25071.cpp:2:2: error: expected unqualified-id before numeric constant
  2 
  ^
0_0_19603850_25071.cpp:7:2: error: expected unqualified-id before numeric constant
  7 int max1[maxn<<2];
  ^
0_0_19603850_25071.cpp:8:2: error: expected unqualified-id before numeric constant
  8 
  ^
0_0_19603850_25071.cpp:13:1: error: expected unqualified-id before numeric constant
 13 
 ^
0_0_19603850_25071.cpp:18:1: error: expected unqualified-id before numeric constant
 18 
 ^