View Compilation Error

0_0_22950349_5139.cpp: In function 'void initHeap()':
0_0_22950349_5139.cpp:85:33: error: 'memset' was not declared in this scope
     memset(Heap, 0, sizeof(Heap));
                                 ^
0_0_22950349_5139.cpp: In function 'int main()':
0_0_22950349_5139.cpp:173:34: error: 'sort' was not declared in this scope
         sort(vp.begin(), vp.end());
                                  ^