View Compilation Error

0_0_12596259_30837.cpp: In function `void dfs(int, int)':
0_0_12596259_30837.cpp:36: error: `d' undeclared (first use this function)
0_0_12596259_30837.cpp:36: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12596259_30837.cpp:36: error: expected `;' at end of input
0_0_12596259_30837.cpp:36: error: expected `}' at end of input
0_0_12596259_30837.cpp:36: error: expected `}' at end of input
0_0_12596259_30837.cpp:36: error: expected `}' at end of input