์ฝ๋
๐ ๊ท์น์ ์ ์ฐพ์๋ณด์...
const fs = require('fs');
const input = fs.readFileSync('/dev/stdin').toString().trim().split('\n').map(Number);
const N = input.shift();
const arr = [0, 1, 2, 4];
for (let i = 1; i <= N; i++) {//์ฃผ์ด์ง case ๋งํผ ๋ฐ๋ณต
const num = input[i - 1];
for (let j = 4; j <= num; j++) {
arr[j] = arr[j - 1] + arr[j - 2] + arr[j - 3];
}
console.log(arr[num]);
}