Compilare: warning: value assigned to `n` is never read --> main.rs:18:13 | 18 | let mut n = 0usize; | ^ | = note: `#[warn(unused_assignments)]` on by default = help: maybe it is overwritten before being read? warning: unused variable: `solution` --> main.rs:20:13 | 20 | let mut solution = Solution { | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solution` | = note: `#[warn(unused_variables)]` on by default warning: variable does not need to be mutable --> main.rs:20:9 | 20 | let mut solution = Solution { | ----^^^^^^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: fields `i_sp_min`, `j` and `sum` are never read --> main.rs:8:5 | 7 | struct Solution { | -------- fields in this struct 8 | i_sp_min: usize, | ^^^^^^^^ 9 | j: usize, | ^ 10 | sum: i32, | ^^^ | = note: `#[warn(dead_code)]` on by default warning: 4 warnings emitted