function factorial(n) { if (n == 1) return 1; return n * factorial(n - 1); } function solution(n) { var answer = 0; return Math.ceil(factorial(n * 2) / (factorial(n + 1) * factorial(n))); }
카탈란 수(Catalan numbers) 사용
![[Pasted image 20231013175629.png]]
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