View Compilation Error

738980_0_0_10909.cpp: In function `void dfs(int*)':
738980_0_0_10909.cpp:11: error: `max' undeclared (first use this function)
738980_0_0_10909.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
738980_0_0_10909.cpp: In function `int main()':
738980_0_0_10909.cpp:40: error: `max' undeclared (first use this function)