题解 | #统计每个月兔子的总数#

// 主打一个简单
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
    while(line = await readline()){
        let tokens = line.split(' ');
        let month = parseInt(tokens[0]);
        // let b = parseInt(tokens[1]);
        // console.log(a + b);
        let arr = [1];
        for(let i = 1; i<= month; i++) {
            let arrNew = arr; // 这个月的新兔子组
            arr.forEach(item => {
                // let itemNew = {
                //     ...item,
                //     newMonth: i,
                // }
                // arrNew.push({...item, newMonth: i});
                (i - item) >= 2 && arrNew.push(i);
            })
            arr = arrNew;
            arrNew = null;
        }
        // let sum = 0;
        // arr.forEach(item => {
        //     sum = sum+
        // })
        console.log(arr.length);
    }
}()