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 stack = [];
        for (let i = 0; i < line.length; i++) {
            if (line[i] === stack[stack.length - 1]) {
                stack.pop();
            } else {
                stack.push(line[i]);
            }
        }
        if (stack.length == 0) {
            console.log("0");
        } else {
            console.log(stack.join(""));
        }
    }
})();