[20251203] BOJ / G5 / 합분해 / 설진영 #1576
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Implement dynamic programming solution for the 합분해 problem.
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🧷 문제 링크
https://www.acmicpc.net/problem/2225
🧭 풀이 시간
25분
👀 체감 난이도
✏️ 문제 설명
0부터 N까지의 정수 K개를 더해서 합이 N이 되는 경우의 수를 구하는 문제
🔍 풀이 방법
dp[k][n] = k개의 수로 합 n을 만드는 경우의 수
점화식: dp[k][n] = dp[k][n-1] + dp[k-1][n]
dp[k][n-1]: 마지막 수에 1을 더한 경우dp[k-1][n]: 마지막 수로 0을 선택한 경우누적합 성질 이용
⏳ 회고
dp 꿀잼