View Compilation Error

0_0_23396125_7722.cpp: In function 'int main()':
0_0_23396125_7722.cpp:16:37: error: 'memset' was not declared in this scope
                 memset(d,0,sizeof(d));  
                                     ^
0_0_23396125_7722.cpp:29:34: error: 'memset' was not declared in this scope
            memset(dp,0,sizeof(dp));  
                                  ^