View Compilation Error

0_0_24096648_3843.cpp: In member function 'void rmq::build(int)':
0_0_24096648_3843.cpp:34:18: error: 'bs' was not declared in this scope
         f1(i, 1, bs) a[i][0] = b[i];
                  ^
0_0_24096648_3843.cpp:10:42: note: in definition of macro 'f1'
 #define f1(i, a, b) for (int i = a; i <= b; i ++)
                                          ^