View Compilation Error

0_0_11363872_26658.cpp:8: error: size of array `parent' is too large
0_0_11363872_26658.cpp: In function `int main()':
0_0_11363872_26658.cpp:12: error: redeclaration of `long long int m'
0_0_11363872_26658.cpp:11: error: `long long int m' previously declared here
0_0_11363872_26658.cpp:17: error: `n' undeclared (first use this function)
0_0_11363872_26658.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11363872_26658.cpp:19: error: `parent' undeclared (first use this function)