View Compilation Error

0_0_9796474_27654.cpp: In function `void bfs(int, int)':
0_0_9796474_27654.cpp:11: error: `max' undeclared (first use this function)
0_0_9796474_27654.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9796474_27654.cpp: In function `int find()':
0_0_9796474_27654.cpp:45: error: `max' undeclared (first use this function)
0_0_9796474_27654.cpp: In function `int main()':
0_0_9796474_27654.cpp:59: error: `max' undeclared (first use this function)