File "/in/Dijkstra.ml", line 92, characters 4-5:
92 |   | _ -> 
         ^
Warning 11 [redundant-case]: this match case is unused.

File "/in/Dijkstra.ml", line 39, characters 6-14:
39 |   let infinity = max_int/2 in
           ^^^^^^^^
Warning 26 [unused-var]: unused variable infinity.

File "/in/Dijkstra.ml", line 47, characters 10-14:
47 |       let flag = ref false in
               ^^^^
Warning 26 [unused-var]: unused variable flag.

File "_none_", line 1:
Alert ocaml_deprecated_auto_include: 
OCaml's lib directory layout changed in 5.0. The str subdirectory has been
automatically added to the search path, but you should add -I +str to the
command-line to silence this alert (e.g. by adding str to the list of
libraries in your dune file, or adding use_str to your _tags file for
ocamlbuild, or using -package str for ocamlfind).