View Compilation Error

0_0_13801921_4146.cpp:1:11: error: #include expects "FILENAME" or <FILENAME>
 #include  
           ^
0_0_13801921_4146.cpp:2:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_13801921_4146.cpp: In function 'int main()':
0_0_13801921_4146.cpp:35:25: error: 'scanf' was not declared in this scope
     while(~scanf("%d",&N)) 
                         ^
0_0_13801921_4146.cpp:57:26: error: 'printf' was not declared in this scope
         printf("%d\n",ans);
                          ^