View Compilation Error

0_0_33288295_27130.cpp: In function 'void update_tree(int, int, int, int, int)':
0_0_33288295_27130.cpp:23:4: error: expected '(' before '%' token
  if%
    ^
0_0_33288295_27130.cpp:23:4: error: expected '}' at end of input