View Compilation Error

0_0_5384142_16594.cpp: In function `void dfs(int, int, int, const int&)':
0_0_5384142_16594.cpp:41: error: redefinition of `void dfs(int, int, int, const int&)'
0_0_5384142_16594.cpp:35: error: `void dfs(int, int, int, const int&)' previously defined here
0_0_5384142_16594.cpp:43: error: `prime' undeclared (first use this function)
0_0_5384142_16594.cpp:43: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5384142_16594.cpp: In function `void dfs(int, int, int)':
0_0_5384142_16594.cpp:49: error: `num' undeclared (first use this function)
0_0_5384142_16594.cpp:50: error: `prime' undeclared (first use this function)