View Compilation Error

0_0_25486994_32146.cpp: In function 'void update(int, int, int, int, int)':
0_0_25486994_32146.cpp:58:13: error: 'pushdown' was not declared in this scope
  pushdown(rt);
             ^
0_0_25486994_32146.cpp: In function 'int query(int, int, int, int, int)':
0_0_25486994_32146.cpp:70:14: error: 'push_down' was not declared in this scope
  push_down(rt);
              ^