题解 | #斐波那契数列#

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


function fib(n) {
    if (n < 3) return 1
    let pre = 1, cur = 1
    for (let i = 3;i <= n;i++) {
        let tmp = pre + cur;
        pre = cur
        cur = tmp
    }    
    return cur;
}

void (async function () {
    // Write your code here
    while ((line = await readline())) {
        console.log(fib(line));
    }
})();