33 lines
812 B
Rust
33 lines
812 B
Rust
use std::io::{read_to_string, stdin};
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fn cantor_string(line: &mut Vec<char>, lo: usize, n: usize) {
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if n == 0 {
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return;
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}
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let x = 3usize.pow(n as u32 - 1);
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for i in lo + x..lo + 2 * x {
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line[i] = ' ';
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}
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cantor_string(line, lo, n - 1);
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cantor_string(line, lo + 2 * x, n - 1);
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}
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fn main() {
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let temp = read_to_string(stdin()).unwrap();
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let mut iter = temp
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.split_ascii_whitespace()
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.map(|x| x.parse::<usize>().unwrap());
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loop {
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let n = match iter.next() {
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Some(n) => n,
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None => {
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break;
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}
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};
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let x = 3usize.pow(n as u32);
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let mut line = vec!['-'; x];
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cantor_string(&mut line, 0, n);
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println!("{}", line.iter().collect::<String>());
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}
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}
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