View Compilation Error

0_0_35739607_9393.cpp: In function 'void spfa(int)':
0_0_35739607_9393.cpp:37:31: error: 'memset' was not declared in this scope
  memset(dis, 0x3f, sizeof(dis));
                               ^
0_0_35739607_9393.cpp: In function 'void work()':
0_0_35739607_9393.cpp:56:26: error: 'memset' was not declared in this scope
  memset(hd, 0, sizeof(hd));
                          ^