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🧷 문제 링크
https://www.acmicpc.net/problem/2011
🧭 풀이 시간
40분
👀 체감 난이도
✏️ 문제 설명
A는 1, B는 2, 그리고 Z는 26와 같은 식으로 대입하여 암호화하는 규칙이 있다.
숫자로 이루어진 문자열을 알파벳으로 해석하는 경우의 수를 구하라.
🔍 풀이 방법
dp. 앞에서부터 i번째 글자까지 해석하는 경우의 수를 dp[i]로 정의하고, 한 글자 해석 가능하면 dp[i-1], 두 글자(10~26) 해석 가능하면 dp[i-2]를 더해 누적.
⏳ 회고