题解 | #点击消除# | Rust

use std::io::{self, *};

struct Solution {}

impl Solution {
    pub fn clearStr(self, input: String) -> String {
        let mut ans = String::from("");
        for c in input.chars() {
            if !ans.is_empty() && c == ans.as_bytes()[ans.len()-1] as char {
                ans.pop();
                continue;
            }
            ans.push(c);
        }
        if ans.is_empty() {
            return String::from("0");
        }
        return ans;
    }
}

fn main() {
    let mut input = String::new();
    io::stdin().read_line(&mut input).unwrap();
    let mut input = input.trim_end().to_string();
    println!("{}", Solution{}.clearStr(input));
}