Compilare: warning: unused import: `Write` --> main.rs:2:26 | 2 | use std::io::{BufReader, Write}; | ^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: unused variable: `output` --> main.rs:10:9 | 10 | let mut output = File::create("turnuri4.out")?; | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_output` | = note: `#[warn(unused_variables)]` on by default warning: unused variable: `stack_1` --> main.rs:18:9 | 18 | let mut stack_1: Vec<usize> = Vec::new(); | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stack_1` warning: unused variable: `stack_2` --> main.rs:19:9 | 19 | let mut stack_2: Vec<usize> = Vec::new(); | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stack_2` warning: unused variable: `aux` --> main.rs:20:9 | 20 | let mut aux: Vec<usize> = Vec::new(); | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_aux` warning: variable `initial_sum` is assigned to, but never used --> main.rs:80:9 | 80 | let mut initial_sum: usize = 0; | ^^^^^^^^^^^^^^^ | = note: consider using `_initial_sum` instead warning: variable does not need to be mutable --> main.rs:10:9 | 10 | let mut output = File::create("turnuri4.out")?; | ----^^^^^^ | | | help: remove this `mut` |