Compilare: warning: unused import: `std::collections::HashMap` --> main.rs:1:5 | 1 | use std::collections::HashMap; | ^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: unused variable: `input` --> main.rs:31:10 | 31 | fn solve(input: &Input) -> u32 { | ^^^^^ help: if this is intentional, prefix it with an underscore: `_input` | = note: `#[warn(unused_variables)]` on by default warning: fields `n`, `k` and `v` are never read --> main.rs:6:5 | 5 | struct Input { | ----- fields in this struct 6 | n: usize, | ^ 7 | k: u32, | ^ 8 | v: Vec<u32>, | ^ | = note: `#[warn(dead_code)]` on by default warning: 3 warnings emitted