View Compilation Error

0_0_9025464_17178.cpp: In function `void dfs(int)':
0_0_9025464_17178.cpp:88: error: `tmp' undeclared (first use this function)
0_0_9025464_17178.cpp:88: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9025464_17178.cpp:90: error: `x' undeclared (first use this function)