View Compilation Error

0_0_25899263_2441.cpp: In function 'int main()':
0_0_25899263_2441.cpp:60:21: error: too few arguments to function 'void* memset(void*, int, size_t)'
         memset(dp,-1);
                     ^
In file included from 0_0_25899263_2441.cpp:4:0:
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);
                  ^