Compilare: warning: unused import: `std::ops::Add` --> main.rs:5:5 | 5 | use std::ops::Add; | ^^^^^^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: unused variable: `n` --> main.rs:78:9 | 78 | let n = sf.next_u32().unwrap(); | ^ help: if this is intentional, prefix it with an underscore: `_n` | = note: `#[warn(unused_variables)]` on by default warning: 2 warnings emitted