题解 | #点击消除#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    while(line = await readline()){
        let tokens = line.split("");
        let arr = [];
        // console.log(tokens);
        for(let i of tokens) {
          if(i == arr[arr.length - 1]) {
            arr.pop();
          }else {
            arr.push(i);
          }
        }
      console.log(arr.length == 0 ? '0' : arr.join(""));
    }
}()


// 看评论区大佬的思路就是强，自己写的太垃圾，还超时了