View Compilation Error

0_0_20297902_25975.cpp:36:14: error: macro "rep" requires 3 arguments, but only 1 given
         rep(h)
              ^
0_0_20297902_25975.cpp: In function 'int main()':
0_0_20297902_25975.cpp:36:9: error: 'rep' was not declared in this scope
         rep(h)
         ^
0_0_20297902_25975.cpp:37:13: error: 'i' was not declared in this scope
         rep(i, 1, n) {
             ^
0_0_20297902_25975.cpp:7:38: note: in definition of macro 'rep'
 #define rep(i, a, b) for (int i = a; i <= b; ++ i)
                                      ^