View Compilation Error

In file included from GCC4.9.2/x86_64-w64-mingw32/include/crtdefs.h:10:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:9,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/cstdio:42,
                 from 0_0_19968086_31521.cpp:1:
0_0_19968086_31521.cpp: In function 'int main()':
0_0_19968086_31521.cpp:54:3: error: expected ';' before 'long'
   __int64 a=*(lower_bound(arr,arr+sum,n));
   ^
0_0_19968086_31521.cpp:55:20: error: 'a' was not declared in this scope
   printf("%I64d\n",a);
                    ^