View Compilation Error

0_0_26302866_11815.cpp: In function 'int main()':
0_0_26302866_11815.cpp:54:27: error: 'scanf' was not declared in this scope
     while (~scanf("%d", &n)) {
                           ^
0_0_26302866_11815.cpp:87:36: error: 'printf' was not declared in this scope
                     printf(" %d", g);
                                    ^
0_0_26302866_11815.cpp:89:35: error: 'printf' was not declared in this scope
                     printf("%d", g);
                                   ^
0_0_26302866_11815.cpp:93:20: error: 'printf' was not declared in this scope
         printf("\n");
                    ^