diff --git "a/Ukj0ng/202601/15 BOJ G5 1\355\225\231\353\205\204.md" "b/Ukj0ng/202601/15 BOJ G5 1\355\225\231\353\205\204.md" new file mode 100644 index 00000000..4b0ec891 --- /dev/null +++ "b/Ukj0ng/202601/15 BOJ G5 1\355\225\231\353\205\204.md" @@ -0,0 +1,47 @@ +``` +import java.io.*; +import java.util.*; + +public class Main { + private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); + private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); + private static long[][] dp; + private static int[] arr; + private static int N; + + public static void main(String[] args) throws IOException { + init(); + + bw.write(dp[N-1][arr[N]] + "\n"); + bw.flush(); + bw.close(); + br.close(); + } + + private static void init() throws IOException { + N = Integer.parseInt(br.readLine()); + arr = new int[N+1]; + dp = new long[N][21]; + StringTokenizer st = new StringTokenizer(br.readLine()); + + for (int i = 1; i <= N; i++) { + arr[i] = Integer.parseInt(st.nextToken()); + } + + dp[1][arr[1]] = 1; + + for (int i = 2; i < N; i++) { + for (int j = 0; j <= 20; j++) { + int lower = j - arr[i]; + if (lower >= 0 && dp[i-1][lower] > 0) { + dp[i][j] += dp[i-1][lower]; + } + int upper = j + arr[i]; + if (upper <= 20 && dp[i-1][upper] > 0) { + dp[i][j] += dp[i-1][upper]; + } + } + } + } +} +```