View Compilation Error

0_0_11829386_6110.cpp:18: error: size of array `tree' is too large
0_0_11829386_6110.cpp: In member function `void SegTree::build(int, int, int)':
0_0_11829386_6110.cpp:22: error: `tree' undeclared (first use this function)
0_0_11829386_6110.cpp:22: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11829386_6110.cpp: In member function `void SegTree::update(int, int, int)':
0_0_11829386_6110.cpp:37: error: `tree' undeclared (first use this function)
0_0_11829386_6110.cpp: In member function `int SegTree::Query(int, int, int)':
0_0_11829386_6110.cpp:56: error: `tree' undeclared (first use this function)