/in/foo.cc:16:9: error: '__int64' does not name a type
 typedef __int64 LL;
         ^~~~~~~
/in/foo.cc:96:1: error: 'LL' does not name a type
 LL solve()
 ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:132:32: error: 'solve' was not declared in this scope
         printf("%I64d\n",solve());
                                ^