day26.rs

use std::io;
use std::io::BufRead;

fn main() {
    let stdin = io::stdin();
    let lines: Vec<std::string::String> = stdin.lock().lines().map(|l| l.unwrap()).collect();
    let date_returned_vec: Vec<&str> = lines[0].split_whitespace().collect();
    let due_date_vec: Vec<&str> = lines[1].split_whitespace().collect();
    
    let date_returned = construct_date(date_returned_vec[0], date_returned_vec[1], date_returned_vec[2]);
    let due_date = construct_date(due_date_vec[0], due_date_vec[1], due_date_vec[2]);
    
    let date_difference = calculate_difference(date_returned, due_date);
    let fine = calculate_fine(date_difference);
    
    println!("{:?}", fine);
}

fn construct_date(d: &str, m: &str, y: &str) -> (isize, isize, isize) {
    let day = match d.parse::<isize>() {
        Ok(i) => i,
        Err(..) => 0
    };
    
    let month = match m.parse::<isize>() {
        Ok(i) => i,
        Err(..) => 0
    };
    
    let year = match y.parse::<isize>() {
        Ok(i) => i,
        Err(..) => 0
    };
    
    (day, month, year)
}

fn calculate_difference(date1: (isize, isize, isize), date2: (isize, isize, isize)) -> (isize, isize, isize) {
    (date1.0 - date2.0, date1.1 - date2.1, date1.2 - date2.2)
}

fn calculate_fine(date_difference: (isize, isize, isize)) -> isize {
    if date_difference.2 < 0 {
        0
    } else if date_difference.2 > 0 {
        10000
    } else if date_difference.1 < 0 {
        0
    } else if date_difference.1 > 0 {
        500 * date_difference.1
    } else if date_difference.0 < 0 {
        0
    } else if date_difference.0 > 0 {
        15 * date_difference.0
    } else {
        0
    }
}