View Compilation Error

0_0_29733106_17231.cpp: In function 'int main()':
0_0_29733106_17231.cpp:29:26: error: 'scanf_s' was not declared in this scope
  while (~scanf_s("%d", &n))
                          ^
0_0_29733106_17231.cpp:31:28: error: 'memset' was not declared in this scope
   memset(sg, -1, sizeof(sg));
                            ^