Submission #1824447

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Source Code Expand

#[cfg(feature = "tests")]
pub mod tests;

use std::io::*;

pub fn main() {
    let i = stdin();
    solve(&mut i.lock(), &mut stdout());
}

pub fn solve(i: &mut BufRead, o: &mut Write) {
    let (r, c) = read(i);
    let (x, y) = read(i);
    let (d, l) = read(i);

    let res = (r - x + 1) * (c - y + 1) * comb(x * y, d) * comb(x * y - d, l);
    writeln!(o, "{}", res).unwrap();
}

fn comb(n: usize, r: usize) -> usize {
    let mut value = 1;
    for i in 0..r {
        value = value * (n - i) / (i + 1);
    }
    value
}

fn read_line(i: &mut BufRead) -> String {
    let mut line = String::new();
    i.read_line(&mut line).unwrap();
    line
}
fn read_usizes(i: &mut BufRead) -> Vec<usize> {
    read_line(i)
        .trim()
        .split(' ')
        .map(|i| i.parse().unwrap())
        .collect()
}
fn read(i: &mut BufRead) -> (usize, usize) {
    let value = 0;
    let r = read_usizes(i);
    (r[0], r[1])
}

Submission Info

Compile Error

warning: unused variable: `value`, #[warn(unused_variables)] on by default
  --> ./Main.rs:41:9
   |
41 |     let value = 0;
   |         ^^^^^

Judge Result