题解 | 汽水瓶

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())) {
        const num = parseInt(line);
        if (num !== 0) {
            console.log(Math.floor(num / 2));
        }
    }
})();