View Compilation Error

732308_0_0_18651.cpp: In function `void dfs(int*, int, int)':
732308_0_0_18651.cpp:35: error: `find' undeclared (first use this function)
732308_0_0_18651.cpp:35: error: (Each undeclared identifier is reported only once for each function it appears in.)
732308_0_0_18651.cpp: In function `int max_clique()':
732308_0_0_18651.cpp:65: error: `find' undeclared (first use this function)