题解 | 删除字符串中出现次数最少的字符

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
    const map = {};
    let lessKeys = [];
    while ((line = await readline())) {
        for (let i = 0; i < line.length; i++) {
            const char = line[i];
            if (map[char]) {
                map[char]++;
            } else {
                map[char] = 1;
            }
        }
        Object.keys(map).forEach((key) => {
            if (lessKeys.length) {
                const lessKey = lessKeys[0];
                if (map[lessKey] === map[key]) {
                    lessKeys.push(key);
                } else if (map[key] < map[lessKey]) {
                    lessKeys = [key];
                }
            } else {
                lessKeys = [key];
            }
        });
        lessKeys.forEach(char=>line = line.replaceAll(char,""))
        console.log(line)
    }
})();