View Compilation Error

0_0_37697571_28503.cpp: In function 'void update(int, int, int, int, int)':
0_0_37697571_28503.cpp:39:5: error: 'uleft' was not declared in this scope
  if(uleft<=mid) {
     ^
0_0_37697571_28503.cpp:40:28: error: 'uright' was not declared in this scope
   update(rt,left,mid,uleft,uright,val);
                            ^
0_0_37697571_28503.cpp:42:9: error: 'uright' was not declared in this scope
  if(mid<uright) {
         ^
0_0_37697571_28503.cpp:43:27: error: 'uleft' was not declared in this scope
   update(rt+1,mid+1,right,uleft,uright,val);
                           ^