21 lines
584 B
Rust
21 lines
584 B
Rust
use std::cmp;
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impl Solution {
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pub fn maximum_odd_binary_number(s: String) -> String {
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let mut bits: Vec<char> = s.chars().collect();
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// sort in reverse order, all ones are at the beginning
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bits.sort_unstable_by_key(|&x| cmp::Reverse(x));
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// find the last one
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let i = bits.iter().rposition(|&x| x == '1').unwrap();
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// and swap with the last zero to obtain odd integer
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let last_index = bits.len() - 1;
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if i < last_index {
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bits.swap(i, last_index);
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}
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bits.into_iter().collect()
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}
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}
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