题解 | #称砝码#

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

let n_len = 0;
let weights = [];
let counts = [];

void async function () {
    // Write your code here
    while(line = await readline()){
        if(!n_len){
            n_len = line
        } else if(weights.length < 1){
            weights = line.split(' ');
        }else {
            counts = line.split(' ')
        }
    }
    let record = new Set();
    record.add(0);
    for(let i = 0; i < n_len; i++){
        for(let j = 1; j <= counts[i]; j++){
            let temp = new Set(record);
            temp.forEach(val => {
                record.add(val + Number(weights[i]));
            })
        }
    }
    console.log(record.size)
}()