View Compilation Error

0_0_11751492_11230.cpp: In function `void dfs(int, int, double)':
0_0_11751492_11230.cpp:37: error: `ti' undeclared (first use this function)
0_0_11751492_11230.cpp:37: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11751492_11230.cpp:37: error: `timu' undeclared (first use this function)
0_0_11751492_11230.cpp:39: error: `pp' undeclared (first use this function)
0_0_11751492_11230.cpp:42: error: `ren' undeclared (first use this function)