Buggy python submission (verdict: Runtime Error):
macro_rules! input {
    ($ttype:ty) => {
        {
            let mut input = String::new();
            let _= std::io::stdin().read_line(&mut input);
            input.trim().parse::<$ttype>().unwrap()
        }
    };

    ($($ttype:ty),*) => {
        {
            use std::io::BufRead;
            let mut input = String::new();
            let stdin = std::io::stdin();
            let _ = stdin.lock().read_line(&mut input);
            let mut iter = input.trim().split_whitespace();
            (
                $(iter.next().unwrap().parse::<$ttype>().unwrap(),)*
            )
        }
    };

    ($ttype:ty; $x:expr) => {
        {
            use std::io::BufRead;
            let mut input = String::new();
            let stdin = std::io::stdin();
            let _ = stdin.lock().read_line(&mut input);
            let v: Vec<$ttype> = input
                .trim()
                .split_whitespace()
                .map(|x| x.parse().unwrap())
                .collect();
            v
        }
    };

    ($ttype:ty; $x:expr; $y:expr) => {
        {
            use std::io::BufRead;
            let mut matrix = Vec::with_capacity($y);
            for _ in 0..$y {
                let mut input = String::new();
                let stdin = std::io::stdin();
                let _ = stdin.lock().read_line(&mut input);
                let v: Vec<$ttype> = input
                    .trim()
                    .split_whitespace()
                    .map(|x| x.parse().unwrap())
                    .collect();
                matrix.push(v);
            }
            matrix
        }
    };
}

fn read_vec() -> Vec<i32> {
    let mut input = String::new();
    let _ = std::io::stdin().read_line(&mut input);
    input.trim().split_whitespace().map(|x| x.parse().unwrap()).collect()
}

fn main() {
    let n = input!(usize);
    let a_list = read_vec();
    let mut b_list = a_list
        .iter()
        .enumerate()
        .map(|(i, x)| x - (i as i32 + 1))
        .collect::<Vec<i32>>();
    b_list.sort();

    let median = if n % 2 == 0 {
        (b_list[n/2-1] + b_list[n/2]) / 2
    } else {
        b_list[n/2]
    };

    let result = b_list
        .iter()
        .map(|x| (x - median).abs())
        .fold(0, |acc, x| acc + x);
    println!("{}", result);
}


Fixed submission:
def main():
    n = int(input())
    a_list = map(lambda x: int(x), input().split(' '))
    b_list = [x - i for i, x in zip(range(1, n+1), a_list)]
    b_list.sort()
    median = 0
    if n % 2 == 0:
        median = (b_list[n//2-1] + b_list[n//2]) / 2
    else:
        median = b_list[n//2]
    result = int(sum([abs(x - median) for x in b_list]))
    print(result)

if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
def main():
    n = int(input())
    a_list = map(lambda x: int(x), input().split(' '))
    b_list = [x - i for i, x in zip(range(1, n+1), a_list)]
    b_list.sort()
    median = 0
    if n % 2 == 0:
        median = (b_list[n/2-1] + b_list[n/2]) / 2
    else:
        median = b_list[n//2]
    result = sum([x - median for x in b_list])
    print(result)

if __name__ == "__main__":
    main()

Fixed submission:
def main():
    n = int(input())
    a_list = map(lambda x: int(x), input().split(' '))
    b_list = [x - i for i, x in zip(range(1, n+1), a_list)]
    b_list.sort()
    median = 0
    if n % 2 == 0:
        median = (b_list[n//2-1] + b_list[n//2]) / 2
    else:
        median = b_list[n//2]
    result = int(sum([abs(x - median) for x in b_list]))
    print(result)

if __name__ == "__main__":
    main()