Compilare: warning: unused import: `std::fs` --> main.rs:1:5 | 1 | use std::fs; | ^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: unnecessary parentheses around function argument --> main.rs:11:21 | 11 | return myGcd(b, (a % b)); | ^^^^^^^ help: remove these parentheses | = note: `#[warn(unused_parens)]` on by default warning: unused variable: `i` --> main.rs:23:9 | 23 | for i in 0..n | ^ help: if this is intentional, prefix it with an underscore: `_i` | = note: `#[warn(unused_variables)]` on by default warning: variable does not need to be mutable --> main.rs:5:10 | 5 | fn myGcd(mut a: i32, mut b: i32) -> i32{ | ----^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: variable does not need to be mutable --> main.rs:5:22 | 5 | fn myGcd(mut a: i32, mut b: i32) -> i32{ | ----^ | | | help: remove this `mut` warning: variable does not need to be mutable --> main.rs:27:13 | 27 | let mut arr:Vec <i32> = line.split_whitespace().map(|x| x.parse().unwrap()).collect(); | ----^^^ | | | help: remove this `mut`