View Compilation Error

0_0_33509064_18374.cpp: In function 'void Dijkstra(int)':
0_0_33509064_18374.cpp:14:28: error: 'memset' was not declared in this scope
  memset(vis, 0, sizeof(vis));
                            ^
0_0_33509064_18374.cpp: In function 'int main()':
0_0_33509064_18374.cpp:77:32: error: 'memset' was not declared in this scope
   memset(path, -1, sizeof(path));
                                ^