View Compilation Error

0_0_7640762_14663.cpp:14: error: invalid function declaration
0_0_7640762_14663.cpp: In function `void dfs(int, int, int)':
0_0_7640762_14663.cpp:31: error: `di' undeclared (first use this function)
0_0_7640762_14663.cpp:31: error: (Each undeclared identifier is reported only once for each function it appears in.)