oily-solutions/even_fibonacci_numbers.rs

fn main() {
    let mut sequence: Vec<i32> = vec![1, 2];
    while sequence[sequence.len() - 1] <= 4000000 {
        let mut last = sequence[sequence.len() - 1];
        let mut secondlast = sequence[sequence.len() - 2];
        (secondlast, last) = (last, secondlast + last);
        sequence.push(last);
    }
    for i in sequence.clone() {
        if i % 2 != 0 || i > 4000000 {
            sequence.remove(
                sequence
                    .iter()
                    .position(|x| *x == i)
                    .expect("Item not found"),
            );
        }
    }
    let sum: i32 = sequence.iter().sum();
    println!("{}", sum);
}