View Compilation Error

0_0_29328998_12368.cpp: In function 'bool bfs()':
0_0_29328998_12368.cpp:13:28: error: 'memset' was not declared in this scope
  memset(vis, 0, sizeof(vis));
                            ^
0_0_29328998_12368.cpp: In function 'int main()':
0_0_29328998_12368.cpp:61:29: error: 'memset' was not declared in this scope
   memset(Map, 0, sizeof(Map));
                             ^