View Compilation Error

0_0_19474295_30906.cpp: In function 'int main()':
0_0_19474295_30906.cpp:17:37: error: 'memset' was not declared in this scope
                 memset(d,0,sizeof(d));
                                     ^
0_0_19474295_30906.cpp:30:34: error: 'memset' was not declared in this scope
            memset(dp,0,sizeof(dp));
                                  ^