From 83478f01f0b88f76140cc1a0c8eccf2c23c999aa Mon Sep 17 00:00:00 2001
From: LiiNi-coder <97495437+LiiNi-coder@users.noreply.github.com>
Date: Thu, 9 Oct 2025 23:55:34 +0900
Subject: [PATCH] =?UTF-8?q?[20251009]=20PGM=20/=20LV2=20/=20=EC=88=AB?=
 =?UTF-8?q?=EC=9E=90=EC=9D=98=20=ED=91=9C=ED=98=84=20/=20=EC=9D=B4?=
 =?UTF-8?q?=EC=9D=B8=ED=9D=AC?=
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---
 ...0\354\235\230 \355\221\234\355\230\204.md" | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 "LiiNi-coder/202510/09 PGM \354\210\253\354\236\220\354\235\230 \355\221\234\355\230\204.md"

diff --git "a/LiiNi-coder/202510/09 PGM \354\210\253\354\236\220\354\235\230 \355\221\234\355\230\204.md" "b/LiiNi-coder/202510/09 PGM \354\210\253\354\236\220\354\235\230 \355\221\234\355\230\204.md"
new file mode 100644
index 00000000..8f9f14d9
--- /dev/null
+++ "b/LiiNi-coder/202510/09 PGM \354\210\253\354\236\220\354\235\230 \355\221\234\355\230\204.md"	
@@ -0,0 +1,23 @@
+```java
+class Solution {
+    public int solution(int n) {
+        int[] sum = new int[n + 1];
+        for(int i=1; i<=n; i++)
+            sum[i] = sum[i-1] + i;
+
+        int l = 0, r = 1, answer = 0;
+        while(l < r && r <= n){
+            int now = sum[r] - sum[l];
+            if(now == n){
+                answer++;
+                r++;
+            }else if(now < n)
+                r++;
+            else
+                l++;
+        }
+        
+        return answer;
+    }
+}
+```