View Compilation Error

0_0_25668570_6344.cpp: In function 'int bfs(int, int)':
0_0_25668570_6344.cpp:11:29: error: 'memset' was not declared in this scope
  memset(dis, -1, sizeof(dis));
                             ^
0_0_25668570_6344.cpp: In function 'int main()':
0_0_25668570_6344.cpp:52:27: error: 'memset' was not declared in this scope
   memset(mp, 0, sizeof(mp));
                           ^