View Compilation Error

0_0_26299293_32726.cpp: In function 'void update(int, int, int, int, int&)':
0_0_26299293_32726.cpp:29:27: error: too many arguments to function 'void new_node(int&)'
     if(!rt) new_node(rt, c);
                           ^
0_0_26299293_32726.cpp:23:6: note: declared here
 void new_node(int& rt) {
      ^