View Compilation Error

0_0_24248293_10468.cpp: In member function 'void Seg::pushdown(int)':
0_0_24248293_10468.cpp:41:15: error: 'rt' was not declared in this scope
         if(mx[rt]<mx[rt<<1]){
               ^
0_0_24248293_10468.cpp:45:15: error: 'rt' was not declared in this scope
         if(mx[rt]<mx[rt<<1|1]){
               ^