View Compilation Error

0_0_33128013_30671.cpp: In function 'void build(int, int, int)':
0_0_33128013_30671.cpp:41:14: error: 'pushup' was not declared in this scope
     pushup(rt);
              ^
0_0_33128013_30671.cpp: In function 'void change(int, int, int, int, int, int)':
0_0_33128013_30671.cpp:63:14: error: 'pushup' was not declared in this scope
     pushup(rt);
              ^