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🧷 문제 링크
https://www.acmicpc.net/problem/5557
🧭 풀이 시간
50분
👀 체감 난이도
✏️ 문제 설명
숫자들이 주어지고 마지막 숫자는 무조건 결과 숫자임.
결과 숫자 제외하고 앞의 숫자들을 각각 더하거나 빼서 결과 숫자와 같게 만드는 방법의 수 구하기.
🔍 풀이 방법
첫번째 수부터 차례대로 계산할 때 중간에 나오는 값은 무조건 0에서 20 사이라는 조건이 있어서 그걸 가지고 dp로 풀었음.
⏳ 회고
완탐하면 안되는데 dp 쓰면 되겠다는 생각을 하는 데에 오래 걸림