Compilare: warning: unused imports: `mem::*`, `write` --> main.rs:4:34 | 4 | collections::*, fmt::*, fs::{write, *}, mem::*, str::* | ^^^^^ ^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: unused variable: `noduri` --> main.rs:27:10 | 27 | let [noduri, _muchii]: [usize; 2] = split_in_x(lines.next().unwrap()); | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_noduri` | = note: `#[warn(unused_variables)]` on by default warning: function `split_in_x_var` is never used --> main.rs:7:4 | 7 | fn split_in_x_var<T: FromStr>(string: &str) -> Vec<T> where T::Err: Debug { | ^^^^^^^^^^^^^^ | = note: `#[warn(dead_code)]` on by default warning: function `find_exista` is never used --> main.rs:15:4 | 15 | fn find_exista(componente_conexe: &mut Vec<HashSet<usize>>, muchie: usize) -> Option<usize> { | ^^^^^^^^^^^ warning: 4 warnings emitted