View Compilation Error

0_0_32416689_19827.cpp: In function 'int main()':
0_0_32416689_19827.cpp:4:15: error: 'scanf' was not declared in this scope
  scanf("%d",&N);
               ^
0_0_32416689_19827.cpp:14:23: error: 'printf' was not declared in this scope
   printf("%d\n",m[b-a]);
                       ^