View Compilation Error

0_0_30692790_24593.cpp: In function 'void build(int, int, int)':
0_0_30692790_24593.cpp:21:14: error: 'pushup' was not declared in this scope
     pushup(rt);
              ^
0_0_30692790_24593.cpp: In function 'void update(int, int, int, int, int)':
0_0_30692790_24593.cpp:42:14: error: 'pushup' was not declared in this scope
     pushup(rt);
              ^