View Compilation Error

0_0_38316018_7621.cpp:14:26: error: 'k' was not declared in this scope
 int rt[N << 2], c[K], ls[k], rs[K];
                          ^
0_0_38316018_7621.cpp: In function 'void update(int, int, int&)':
0_0_38316018_7621.cpp:5:22: error: 'ls' was not declared in this scope
 #define lson l, mid, ls[id]
                      ^
0_0_38316018_7621.cpp:22:23: note: in expansion of macro 'lson'
  if (v <= mid) update(lson);
                       ^
0_0_38316018_7621.cpp:24:16: error: 'ls' was not declared in this scope
  c[id] = max(c[ls[id]], c[rs[id]]);
                ^
0_0_38316018_7621.cpp: In function 'int query(int, int, int)':
0_0_38316018_7621.cpp:5:22: error: 'ls' was not declared in this scope
 #define lson l, mid, ls[id]
                      ^
0_0_38316018_7621.cpp:42:27: note: in expansion of macro 'lson'
  if (l2 <= mid) s = query(lson);
                           ^
0_0_38316018_7621.cpp: In function 'int main()':
0_0_38316018_7621.cpp:58:10: error: 'ls' was not declared in this scope
   memset(ls, 0, sizeof ls);
          ^