Compilare: warning: unused variable: `index` --> main.rs:8:10 | 8 | for (index, line) in BufReader::new(File::open("adunare.in").unwrap()).lines().enumerate(){ | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` | = note: `#[warn(unused_variables)]` on by default warning: 1 warning emitted