题解 | #记负均正#

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
    let a = await readline()
    let b = await readline()
    let bArr = b.split(' ')
    let postive = 0
    let posNum = 0
    bArr.forEach(i => {
        if (Number(i) > 0) {
            postive+=Number(i)
            posNum++
            a--
        } else if (Number(i) === 0) {
            a--
        }
    })
    console.log(a, postive === 0 ? '0.0' : (postive / posNum).toFixed(1))
}()