题解 | #统计字符#

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
    const str = await readline()
    let alphabetCount = 0
    let blanckCount = 0
    let numberCount = 0
    let other = 0
    for (let i=0; i<str.length; i++) {
        if(/[A-Za-z]/.test(str[i])) {
            alphabetCount++
        } else if(/\s/.test(str[i])) {
            blanckCount++
        } else if(/[0-9]/.test(str[i])) {
            numberCount++
        } else {
            other++
        }
    }
    console.log(alphabetCount)
    console.log(blanckCount)
    console.log(numberCount)
    console.log(other)

}()