View Compilation Error

0_0_39529856_18190.cpp: In function 'void insert(long long int, int, long long int*)':
0_0_39529856_18190.cpp:47:45: error: 'lowbi' was not declared in this scope; did you mean 'lowbit'?
   47 |     while(pos <= 1e6) tr[pos] += val,pos += lowbi t(pos);
      |                                             ^~~~~
      |                                             lowbit