View Compilation Error

0_0_30004349_18157.cpp: In function 'int main()':
0_0_30004349_18157.cpp:14:37: error: 'memset' was not declared in this scope
         memset(indeg,0,sizeof(indeg));
                                     ^
0_0_30004349_18157.cpp:39:45: error: 'max' was not declared in this scope
                     maxx=max(maxx,(ans^a[i]));
                                             ^