题解 | #进制转换#

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
    function change(str) {
        let map = {
            0: 0,
            1: 1,
            2: 2,
            3: 3,
            4: 4,
            5: 5,
            6: 6,
            7: 7,
            8: 8,
            9: 9,
            A: 10,
            B: 11,
            C: 12,
            D: 13,
            E: 14,
            F: 15,
        };
        let prefix = str.slice(0, 2);
        let content = str.slice(2).split("");
        let sum = 0;

        if (prefix === "0x") {
            content.reverse().map((char, index) => {
                sum += map[char] * Math.pow(16, index);
            });
        }

        return sum;
    }
    while ((line = await readline())) {
        let tokens = line.split(" ");
        let a = parseInt(tokens[0]);
        let b = parseInt(tokens[1]);

        tokens.map(str => {
            console.log(change(str));
        })
    }
})();