题解 | #记票统计#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    const n = parseInt(await readline());
    const keys = (await readline()).split(" ");
    const m = parseInt(await readline());
    const list = (await readline()).split(" ");
    let Invalid = 0;
    const map = new Map();
    for(const item of keys){
        map.set(item,0);
    }
    for(const item of list){
        if(map.has(item)) map.set(item,map.get(item)+1);
        else Invalid++;
    }
    for(const item of map.entries()){
        console.log(item.join(" : "));
    }
    console.log("Invalid :",Invalid);
}()