题解 | #字符统计#

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 str = await readline();
    const map = new Map();
     let res = ""
    for (let i = 0; i < str.length; i++) {
        map.set(str[i], (map.get(str[i]) || 0) + 1);
    }
    const sortedEntries = [...map.entries()].sort((a, b) => {
        if (a[1] === b[1]) {
            // 如果值相同
            return a[0].localeCompare(b[0]); // 按照 ASCII 码排序
        } else {
            return b[1] - a[1]; // 否则按照值的大小降序排序
        }
    });
     sortedEntries.forEach((item) => {
       res += item[0]
     })
     console.log(res)
})();