View Compilation Error

0_0_26637645_956.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_26637645_956.cpp:2:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_26637645_956.cpp:3:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_26637645_956.cpp:4:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_26637645_956.cpp: In function 'int main()':
0_0_26637645_956.cpp:11:25: error: 'scanf' was not declared in this scope
     while(~scanf("%d",&n))
                         ^
0_0_26637645_956.cpp:33:32: error: 'printf' was not declared in this scope
         if(flag) printf("YES\n");
                                ^
0_0_26637645_956.cpp:34:27: error: 'printf' was not declared in this scope
         else printf("NO\n");
                           ^