View Compilation Error

0_0_29477307_23885.cpp: In function 'void initEdge()':
0_0_29477307_23885.cpp:42:31: error: 'memset' was not declared in this scope
  memset(head, -1, sizeof(head));
                               ^
0_0_29477307_23885.cpp: In function 'void SPFA()':
0_0_29477307_23885.cpp:59:32: error: 'memset' was not declared in this scope
  memset(vis, false, sizeof(vis));
                                ^
0_0_29477307_23885.cpp: In function 'void Dijstra()':
0_0_29477307_23885.cpp:84:43: error: 'memset' was not declared in this scope
  memset(vis, false, (N + 1)*sizeof(vis[0]));
                                           ^
0_0_29477307_23885.cpp: In function 'int main()':
0_0_29477307_23885.cpp:141:2: error: expected primary-expression at end of input
  return
  ^
0_0_29477307_23885.cpp:141:2: error: expected ';' at end of input
0_0_29477307_23885.cpp:141:2: error: expected '}' at end of input