View Compilation Error

0_0_8501025_19932.cpp:6: error: `max' was not declared in this scope
0_0_8501025_19932.cpp: In function `int updateRoot(int)':
0_0_8501025_19932.cpp:9: error: `tree' undeclared (first use this function)
0_0_8501025_19932.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8501025_19932.cpp: In function `int MakeTree(int, int, int)':
0_0_8501025_19932.cpp:16: error: `tree' undeclared (first use this function)
0_0_8501025_19932.cpp: In function `int update(int, int, int, int, int)':
0_0_8501025_19932.cpp:29: error: `tree' undeclared (first use this function)
0_0_8501025_19932.cpp: In function `int query(int, int, int, int, int)':
0_0_8501025_19932.cpp:46: error: `tree' undeclared (first use this function)