View Compilation Error

0_0_33088619_17873.cpp: In function 'int query(int, int, int)':
0_0_33088619_17873.cpp:30:41: error: 'qu' was not declared in this scope
     if (t[i*2+1].l <= r) ret = max(ret, qu
                                         ^
0_0_33088619_17873.cpp:30:41: error: expected '}' at end of input