View Compilation Error

0_0_16736956_29086.cpp: In function 'int main()':
0_0_16736956_29086.cpp:71:40: error: 'scanf_s' was not declared in this scope
  while (scanf_s("%lld%lld%lld",&n,&x,&m)&&n>0&&m>0&&x>0 )
                                        ^