liquidhelium

use rayon::prelude::*;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::{Duration, Instant};
use std::io::{self, Write};

/// Finds sets of 3 numbers within `[range_start, range_end]`
/// such that the sum of their 5th powers equals `target_sum`.
/// Complexity: O(N^2 log N) time, O(N^2) space (compact)

liquidhelium

// 定义零：作为自然数的起点
struct Zero;

// 定义后继：Succ<N> 表示自然数 N 的后继（即 N + 1）
struct Succ<N>(N);

// 为自然数定义特性
trait Natural {
    // 获取数值（运行时）
    fn value() -> usize;