From d9ddee76d974d6624f2e5ca7ac72df660e11f58a Mon Sep 17 00:00:00 2001
From: Jonghwan Lee <123362165+0224LJH@users.noreply.github.com>
Date: Fri, 31 Oct 2025 22:52:09 +0900
Subject: [PATCH 1/2] =?UTF-8?q?[20251031]=20BOJ=20/=20G5=20/=20=EB=8B=A4?=
 =?UTF-8?q?=EC=9D=B4=EC=96=B4=ED=8A=B8=20/=20=EC=9D=B4=EC=A2=85=ED=99=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...44\354\235\264\354\226\264\355\212\270.md" | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 "0224LJH/202510/31 BOJ \353\213\244\354\235\264\354\226\264\355\212\270.md"

diff --git "a/0224LJH/202510/31 BOJ \353\213\244\354\235\264\354\226\264\355\212\270.md" "b/0224LJH/202510/31 BOJ \353\213\244\354\235\264\354\226\264\355\212\270.md"
new file mode 100644
index 00000000..3ee364cf
--- /dev/null
+++ "b/0224LJH/202510/31 BOJ \353\213\244\354\235\264\354\226\264\355\212\270.md"	
@@ -0,0 +1,56 @@
+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+public class Main { 
+	
+	static long diff;
+	static StringBuilder sb = new StringBuilder();
+	
+	
+    public static void main(String[] args) throws IOException {
+    	init();
+    	process();
+    	print();
+    }
+
+    private static void init() throws IOException{
+    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));;
+    	diff = Integer.parseInt(br.readLine());
+    }
+    
+    private static void process() {
+    	
+    	long pre =1l;
+        boolean isEmpty = true;
+    	for (long i = 2; i <= 500000; i++) {
+    		long num = i*i;
+    		if (num - pre > diff) break;
+    		pre = num;
+    		
+    		long target = num - diff;
+    		if (target == 0) continue;
+    		long sqrt = (long) Math.sqrt(target);
+    		if (sqrt*sqrt != target) continue;
+    		isEmpty = false;
+    		sb.append(i).append("\n");
+    		
+    		
+    		
+    	}
+    	
+    	if(isEmpty)sb.append("-1");
+
+    }
+    
+
+    
+    private static void print() {
+    	System.out.println(sb.toString());
+    }
+}
+
+
+```

From 60047a7fc0d6a072b450b3113aa76189e213d046 Mon Sep 17 00:00:00 2001
From: Jonghwan Lee <123362165+0224LJH@users.noreply.github.com>
Date: Mon, 3 Nov 2025 23:48:11 +0900
Subject: [PATCH 2/2] =?UTF-8?q?[20251103]=20PGM=20/=20=20Lv2=20/=20?=
 =?UTF-8?q?=EB=92=A4=EC=97=90=20=EC=9E=88=EB=8A=94=20=ED=81=B0=20=EC=88=98?=
 =?UTF-8?q?=20=EC=B0=BE=EA=B8=B0=20/=20=EC=9D=B4=EC=A2=85=ED=99=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ... \354\210\230 \354\260\276\352\270\260.md" | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 "0224LJH/202511/03 PGM \353\222\244\354\227\220 \354\236\210\353\212\224 \355\201\260 \354\210\230 \354\260\276\352\270\260.md"

diff --git "a/0224LJH/202511/03 PGM \353\222\244\354\227\220 \354\236\210\353\212\224 \355\201\260 \354\210\230 \354\260\276\352\270\260.md" "b/0224LJH/202511/03 PGM \353\222\244\354\227\220 \354\236\210\353\212\224 \355\201\260 \354\210\230 \354\260\276\352\270\260.md"
new file mode 100644
index 00000000..6daefe88
--- /dev/null
+++ "b/0224LJH/202511/03 PGM \353\222\244\354\227\220 \354\236\210\353\212\224 \355\201\260 \354\210\230 \354\260\276\352\270\260.md"	
@@ -0,0 +1,30 @@
+```java
+import java.io.*;
+import java.util.*;
+
+class Solution {
+    public int[] solution(int[] numbers) {
+        int n = numbers.length;
+        int[] answer = new int[n];
+        Stack<Integer> stack = new Stack<>();
+
+        for (int i = n - 1; i >= 0; i--) {
+            // 현재 원소보다 작거나 같은 스택의 원소들을 제거
+            while (!stack.isEmpty() && stack.peek() <= numbers[i]) {
+                stack.pop();
+            }
+            
+            if (stack.isEmpty()) {
+                answer[i] = -1;
+            } else {
+                // 스택의 맨 위가 뒷 큰수
+                answer[i] = stack.peek();
+            }
+
+            stack.push(numbers[i]);
+        }
+        
+        return answer;
+    }
+}
+```