View Compilation Error

0_0_21371382_27459.cpp: In function 'int main(int, const char**)':
0_0_21371382_27459.cpp:26:20: error: expected ')' before numeric constant
         memset(sum 0, sizeof(sum));
                    ^
0_0_21371382_27459.cpp:26:34: error: too few arguments to function 'void* memset(void*, int, size_t)'
         memset(sum 0, sizeof(sum));
                                  ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cstring:42:0,
                 from 0_0_21371382_27459.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/string.h:43:18: note: declared here
   void * __cdecl memset(void *_Dst,int _Val,size_t _Size);
                  ^
0_0_21371382_27459.cpp:58:39: error: 'kase' was not declared in this scope
         printf("Case #%d: %I64d\n", ++kase, ans);
                                       ^