View Compilation Error

0_0_38505526_699.cpp: In function 'int main()':
0_0_38505526_699.cpp:8:26: error: 'scanf_s' was not declared in this scope
  while (~scanf_s("%d", &n))
                          ^
0_0_38505526_699.cpp:10:25: error: 'memset' was not declared in this scope
   memset(a, 0, sizeof(a)); memset(D, 0, sizeof(D));
                         ^