题解 | #汽水瓶#

const readline = require('readline');

const data: string[] = [];

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

rl.on('line', function (line) {
    if (line !== '0') {
        data.push(line);
    }
});

rl.on('close', () => {
    data.forEach((item) => {
        console.log(getBottleNum(Number(item)));
    })
})

const getBottleNum = (emptyBottle: number): number => {
    let bottle = 0;

    while(emptyBottle / 3 >= 1) {
        bottle += Math.floor(emptyBottle/3);
        emptyBottle = Math.floor(emptyBottle/3) + emptyBottle % 3;
    }

    if (emptyBottle === 2) {
        bottle++;
    }

    return bottle;
}