题解 | #记票统计#

let l1 = readline();
let arr = readline().split(' ');
let l3 = readline();
let brr = readline().split(' ');
let obj = {};
let s = 0;
for(let i = 0; i < brr.length; i++) {
    let item = brr[i];
    if(obj[item]) {
        obj[item] += 1;
    } else if(arr.includes(item)) {
        obj[item] = 1;
    } else {
        s += 1;
    }
}
for(let i = 0; i < arr.length; i++) {
    console.log(`${ arr[i] } : ${ obj[arr[i]] || 0 }`);
}
console.log(`Invalid : ${s}`);