View Compilation Error

0_0_35264988_31150.cpp: In function 'void PushUp(int)':
0_0_35264988_31150.cpp:32:33: error: 'max' was not declared in this scope
  P[i].rf = max(P[i].rf, P[rc].rf);
                                 ^
0_0_35264988_31150.cpp: In function 'int main()':
0_0_35264988_31150.cpp:15:38: error: 'scanf_s' was not declared in this scope
 #define scc(x,y) scanf_s("%d%d",&x,&y)
                                      ^
0_0_35264988_31150.cpp:128:2: note: in expansion of macro 'scc'
  scc(n, m);
  ^