View Compilation Error

0_0_33759454_26247.cpp: In member function 'int SegTree::query2(int, int, int)':
0_0_33759454_26247.cpp:33:13: error: 'ln' was not declared in this scope
         if (ln[o] > qr || rn[o] < ql) return -INF;
             ^
0_0_33759454_26247.cpp:33:27: error: 'rn' was not declared in this scope
         if (ln[o] > qr || rn[o] < ql) return -INF;
                           ^
0_0_33759454_26247.cpp: In member function 'void SegTree::update(int, int, int)':
0_0_33759454_26247.cpp:42:13: error: 'ln' was not declared in this scope
         if (ln[o] > ql || rn[o] < ql) return;
             ^
0_0_33759454_26247.cpp:42:27: error: 'rn' was not declared in this scope
         if (ln[o] > ql || rn[o] < ql) return;
                           ^