Compilare: warning: unreachable statement --> main.rs:20:5 | 19 | return Ok(()); | ------------- any code following this expression is unreachable 20 | let mut best = 0; | ^^^^^^^^^^^^^^^^^ unreachable statement | = note: `#[warn(unreachable_code)]` on by default warning: unused variable: `output` --> main.rs:9:9 | 9 | let mut output = BufWriter::new(File::create("sir9.out")?); | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_output` | = note: `#[warn(unused_variables)]` on by default warning: unused variable: `string` --> main.rs:11:9 | 11 | let string = input | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string` warning: variable does not need to be mutable --> main.rs:9:9 | 9 | let mut output = BufWriter::new(File::create("sir9.out")?); | ----^^^^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: 4 warnings emitted