Submission #3424488

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Source Code Expand

/// Thank you tanakh!!!
/// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let mut s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

fn main() {
    input!(k: usize);
    let n = 50;
    let mut b = vec![k / n; n];
    for i in 0..(k % n) {
        b[i] += 1;
    }

    assert_eq!(b.iter().sum::<usize>(), k);
    let mut upper_a = vec![0; n];
    let mut lower_a = vec![0; n];
    for i in 0..n {
        lower_a[i] = if (n + 1) * b[i] < k {
            0
        } else {
            (n + 1) * b[i] - k
        };
        upper_a[i] = (n + 1) * b[i] + (n - 1) - k;
    }
    println!("{}", n);
    for i in 0..n {
        if i > 0 {
            print!(" ");
        }
        print!("{}", upper_a[i]);
    }
    println!();
}

Submission Info

Compile Error

warning: variable does not need to be mutable, #[warn(unused_mut)] on by default
  --> ./Main.rs:9:13
   |
9  |         let mut s = {
   |             ^^^^^
...
53 |     input!(k: usize);
   |     ----------------- in this macro invocation

Judge Result