/in/foo.cc:3:9: error: '__int64' does not name a type
 typedef __int64 LL;
         ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:5: error: 'LL' was not declared in this scope
     LL ans = 0;
     ^~
/in/foo.cc:17:13: error: 'ans' was not declared in this scope
             ans+=x-*sk.begin();
             ^~~
/in/foo.cc:25:11: error: 'ans' was not declared in this scope
     cout<<ans<<endl;
           ^~~