View Compilation Error

0_0_16821935_3591.cpp:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_16821935_3591.cpp:2:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_16821935_3591.cpp: In function 'int main()':
0_0_16821935_3591.cpp:37:25: error: 'scanf' was not declared in this scope
     while(scanf("%d", &n) != EOF && n != -1)
                         ^
0_0_16821935_3591.cpp:37:30: error: 'EOF' was not declared in this scope
     while(scanf("%d", &n) != EOF && n != -1)
                              ^
0_0_16821935_3591.cpp:39:34: error: 'memset' was not declared in this scope
         memset(dp, -1, sizeof(dp));
                                  ^
0_0_16821935_3591.cpp:40:51: error: 'printf' was not declared in this scope
         printf("%d: %lld\n", n, DFS(0, 0, 0, 0, 0));
                                                   ^