View Compilation Error

0_0_34008642_25932.cpp: In function 'int main()':
0_0_34008642_25932.cpp:12:30: error: 'scanf' was not declared in this scope
     while(~scanf("%d%d",&n,&m))
                              ^
0_0_34008642_25932.cpp:17:19: error: 'sort' was not declared in this scope
         sort(a,a+n);
                   ^
0_0_34008642_25932.cpp:18:29: error: 'printf' was not declared in this scope
         printf("%d\n",m/a[0]);
                             ^