View Compilation Error

0_0_29569143_27968.cpp: In function 'int main()':
0_0_29569143_27968.cpp:46:19: error: 'scanf_s' was not declared in this scope
   scanf_s("%d", &n);
                   ^
0_0_29569143_27968.cpp:71:18: error: 'ans' was not declared in this scope
  cout << "0 " << ans << endl;
                  ^