View Compilation Error

0_0_31666490_32286.cpp: In function 'int main()':
0_0_31666490_32286.cpp:4:30: error: 'scanf' was not declared in this scope
     while(~scanf("%d%d",&n,&m))
                              ^
0_0_31666490_32286.cpp:20:28: error: 'printf' was not declared in this scope
         printf("%d ",a[i]/m);
                            ^
0_0_31666490_32286.cpp:23:31: error: 'printf' was not declared in this scope
         printf("%d\n",a[j-1]/k);
                               ^
0_0_31666490_32286.cpp:25:35: error: 'printf' was not declared in this scope
             printf("%d\n",a[j-1]/m);
                                   ^