From 0b72f4118edd6cc7009ce2e74dd189416345c9e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=B0=95=EC=8B=A0=EC=A7=80?=
 <101992179+ksinji@users.noreply.github.com>
Date: Wed, 3 Dec 2025 23:40:42 +0900
Subject: [PATCH] =?UTF-8?q?[20251203]=20BOJ=20/=20G5=20/=201=ED=95=99?=
 =?UTF-8?q?=EB=85=84=20/=20=EA=B0=95=EC=8B=A0=EC=A7=80?=
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---
 .../03 BOJ 1\355\225\231\353\205\204.md"      | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 "ksinji/202512/03 BOJ 1\355\225\231\353\205\204.md"

diff --git "a/ksinji/202512/03 BOJ 1\355\225\231\353\205\204.md" "b/ksinji/202512/03 BOJ 1\355\225\231\353\205\204.md"
new file mode 100644
index 00000000..6e1d941d
--- /dev/null
+++ "b/ksinji/202512/03 BOJ 1\355\225\231\353\205\204.md"	
@@ -0,0 +1,42 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        int n = Integer.parseInt(br.readLine());
+        int[] num = new int[n];
+
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < n; i++) {
+            num[i] = Integer.parseInt(st.nextToken());
+        }
+
+        long[][] dp = new long[n - 1][21];
+
+        dp[0][num[0]] = 1;
+
+        for (int i = 1; i < n - 1; i++) {
+            for (int sum = 0; sum <= 20; sum++) {
+                if (dp[i - 1][sum] == 0) continue;
+
+                int plus = sum + num[i];
+                int minus = sum - num[i];
+
+                if (plus <= 20) {
+                    dp[i][plus] += dp[i - 1][sum];
+                }
+                if (minus >= 0) {
+                    dp[i][minus] += dp[i - 1][sum];
+                }
+            }
+        }
+
+        int target = num[n - 1];
+        System.out.println(dp[n - 2][target]);
+    }
+}
+
+```