View Compilation Error

0_0_28682710_17046.cpp: In function 'void build(int, int, int)':
0_0_28682710_17046.cpp:21:10: error: too few arguments to function 'void push_up(int)'
  push_up();
          ^
0_0_28682710_17046.cpp:10:6: note: declared here
 void push_up(int rt){
      ^