提出 #28419154

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ソースコード 拡げる

#[allow(unused_imports)]
use dining_table::*;

#[fastout]
fn main() {
    input! {
        k: u64,
    }
    let mut ans = 0;
    for a in (1..).take_while(|&a| a * a * a <= k) {
        for b in (a..).take_while(|&b| a * b * b <= k) {
            let c = k / (a * b);
            if k == a * b * c {
                ans += 1;
            }
        }
    }
    println!("{}", ans);
}

// template {{{
mod dining_table {
    #![allow(unused_imports)]
    pub use ascii::{AsciiChar, AsciiStr, AsciiString};
    pub use itertools::Itertools;
    pub use itertools_num::ItertoolsNum;
    pub use proconio::marker::Usize1;
    pub use proconio::{fastout, input};
    pub use superslice::Ext;

    #[allow(unused_imports)]
    #[cfg(feature = "dbg")]
    pub use dbg::lg;
    #[cfg(not(feature = "dbg"))]
    #[allow(unused_macros)]
    #[macro_export]
    macro_rules! lg {
        ($($expr:expr),*) => {};
    }
}
// }}}

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