View Compilation Error

0_0_39587829_30900.cpp: In function 'std::vector<long long int> dtou(long long int, long long int, long long int)':
0_0_39587829_30900.cpp:163:15: error: 'st' was not declared in this scope; did you mean 'it'?
  163 |     auto it = st[x].lower_bound({l, 0});
      |               ^~
      |               it