View Compilation Error

0_0_16410963_22586.cpp: In function 'int main()':
0_0_16410963_22586.cpp:33:18: error: 'scanf_s' was not declared in this scope
  scanf_s("%d", &t);
                  ^
0_0_16410963_22586.cpp:34:27: error: 'memset' was not declared in this scope
  memset(sg, -1, sizeof(sg));
                           ^