View Compilation Error

0_0_2046301_20726.cpp: In function `int dfs(int, int, int)':
0_0_2046301_20726.cpp:23: error: `min' undeclared (first use this function)
0_0_2046301_20726.cpp:23: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2046301_20726.cpp: In function `void suotu()':
0_0_2046301_20726.cpp:63: error: `memset' undeclared (first use this function)
0_0_2046301_20726.cpp: In function `int main()':
0_0_2046301_20726.cpp:71: error: `scanf' undeclared (first use this function)
0_0_2046301_20726.cpp:71: error: `EOF' undeclared (first use this function)
0_0_2046301_20726.cpp:88: error: `cout' undeclared (first use this function)