๐ ํฌ๊ธฐ 2 ์ด์์์ ์๊ธฐ๋ ํน์ ๋ชจ์์ ๊ฐ 2๊ฐ์ด๊ณ ๋๋จธ์ง ๊ฒฝ์ฐ์ ์๋ฅผ ์ด์ ๊ฐ์์ ์ฌ์ฉํ๋ ๊ฒ์ด ํฌ์ธํธ์ธ ๊ฒ ๊ฐ๋ค.
๐จ ์ฐธ๊ณ ์ฝ๋
์ฝ๋
const fs = require('fs');
const input = +fs.readFileSync('/dev/stdin').toString().trim();
const dp = new Array(input + 1).fill(0);
dp[0] = 1;
dp[2] = 3;
for (let i = 4; i < input + 1; i += 2) {
dp[i] = dp[i - 2] * 3;
for (let j = 4; j <= i; j += 2) {
dp[i] += dp[i - j] * 2;
}
}
console.log(dp[input]);