View Compilation Error

0_0_33089285_30949.cpp: In function 'int query(int, int, int)':
0_0_33089285_30949.cpp:151:44: error: 'qu' was not declared in this scope
     return max(ans, max(query(lson, l, r), qu
                                            ^
0_0_33089285_30949.cpp:151:44: error: expected ';' at end of input
0_0_33089285_30949.cpp:151:44: error: expected '}' at end of input