View Compilation Error

0_0_30372504_2920.cpp: In function 'int main()':
0_0_30372504_2920.cpp:13:36: error: 'scanf_s' was not declared in this scope
 #define lldin(a) scanf_s("%lld", &a)
                                    ^
0_0_30372504_2920.cpp:85:2: note: in expansion of macro 'lldin'
  lldin(t);
  ^