View Compilation Error

0_0_34485056_25463.cpp: In function 'int main()':
0_0_34485056_25463.cpp:38:15: error: 'scanf' was not declared in this scope
  scanf("%d",&T);
               ^
0_0_34485056_25463.cpp:57:30: error: 'printf' was not declared in this scope
   printf("%lld\n",(ans*n)%mod);
                              ^