View Compilation Error

0_0_4786807_28354.cpp:7: error: `N' was not declared in this scope
0_0_4786807_28354.cpp: In function `int main()':
0_0_4786807_28354.cpp:22: error: `n' undeclared (first use this function)
0_0_4786807_28354.cpp:22: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4786807_28354.cpp:25: error: `s' undeclared (first use this function)
0_0_4786807_28354.cpp:32: error: `t' undeclared (first use this function)
0_0_4786807_28354.cpp:36: error: `jud' undeclared (first use this function)
0_0_4786807_28354.cpp:36: error: `CLR' undeclared (first use this function)
0_0_4786807_28354.cpp:37: error: `root' undeclared (first use this function)
0_0_4786807_28354.cpp:38: error: `dfs' undeclared (first use this function)