View Compilation Error

0_0_11087580_14295.cpp: In function `int find_path(int)':
0_0_11087580_14295.cpp:9: error: `n' undeclared (first use this function)
0_0_11087580_14295.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11087580_14295.cpp: In function `int main()':
0_0_11087580_14295.cpp:29: error: `n' undeclared (first use this function)