View Compilation Error

184866_0_32213.cpp: In function `void dfs(int, int)':
184866_0_32213.cpp:9: error: `find' undeclared (first use this function)
184866_0_32213.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
184866_0_32213.cpp: In function `int main()':
184866_0_32213.cpp:33: error: `find' undeclared (first use this function)