View Compilation Error

0_0_33921716_7139.cpp:128:29: error: macro "assert" passed 3 arguments, but takes just 1
   assert(l1, r1, mi[r1] >= y);
                             ^
0_0_33921716_7139.cpp: In member function 'll Treap<T>::tui(int, int)':
0_0_33921716_7139.cpp:128:3: error: 'assert' was not declared in this scope
   assert(l1, r1, mi[r1] >= y);
   ^