View Compilation Error

0_0_14993505_9564.cpp:1:1: error: 'include' does not name a type
 include<bits/stdc++.h>
 ^
0_0_14993505_9564.cpp: In function 'int main()':
0_0_14993505_9564.cpp:9:18: error: 'scanf' was not declared in this scope
     scanf("%d",&_);
                  ^
0_0_14993505_9564.cpp:13:29: error: 'memset' was not declared in this scope
         memset(a,0,sizeof(a));
                             ^
0_0_14993505_9564.cpp:49:44: error: 'printf' was not declared in this scope
         printf("Case #%d: %lld\n",++cas,ans);
                                            ^