From 1c6cb6efde3c942e4ae9a858ddd85e5012d9204e Mon Sep 17 00:00:00 2001
From: JHLEE325 <82587652+JHLEE325@users.noreply.github.com>
Date: Wed, 27 Aug 2025 09:10:21 +0900
Subject: [PATCH] =?UTF-8?q?[20250827]=20BOJ=20/=20G1=20/=20=EA=B5=AC?=
 =?UTF-8?q?=EA=B0=84=20=ED=95=A9=20=EA=B5=AC=ED=95=98=EA=B8=B0=20/=20?=
 =?UTF-8?q?=EC=9D=B4=EC=A4=80=ED=9D=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...1 \352\265\254\355\225\230\352\270\260.md" | 85 +++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 "JHLEE325/202508/27 BOJ G1 \352\265\254\352\260\204 \355\225\251 \352\265\254\355\225\230\352\270\260.md"

diff --git "a/JHLEE325/202508/27 BOJ G1 \352\265\254\352\260\204 \355\225\251 \352\265\254\355\225\230\352\270\260.md" "b/JHLEE325/202508/27 BOJ G1 \352\265\254\352\260\204 \355\225\251 \352\265\254\355\225\230\352\270\260.md"
new file mode 100644
index 00000000..769a5833
--- /dev/null
+++ "b/JHLEE325/202508/27 BOJ G1 \352\265\254\352\260\204 \355\225\251 \352\265\254\355\225\230\352\270\260.md"	
@@ -0,0 +1,85 @@
+```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));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        StringBuilder sb = new StringBuilder();
+
+        int n = Integer.parseInt(st.nextToken());
+        int m = Integer.parseInt(st.nextToken());
+        int k = Integer.parseInt(st.nextToken());
+
+        long[] arr = new long[n];
+        long[] tree = new long[4*n];
+
+        for(int i=0;i<n;i++){
+            arr[i] = Long.parseLong(br.readLine());
+        }
+
+        init(arr,tree,1,0,n-1);
+
+        for(int i=0;i<m+k;i++){
+            st = new StringTokenizer(br.readLine());
+            int op = Integer.parseInt(st.nextToken());
+
+            if(op==1){
+                int a = Integer.parseInt(st.nextToken());
+                long b = Long.parseLong(st.nextToken());
+                update(arr, tree, 1, 0, n-1, a-1,b);
+            }
+            else{
+                int a = Integer.parseInt(st.nextToken());
+                int b = Integer.parseInt(st.nextToken());
+
+                long sum = query(tree,1,0,n-1,a-1,b-1);
+
+                sb.append(sum+"\n");
+            }
+        }
+
+        System.out.println(sb.toString());
+    }
+
+    static void init(long[] arr, long[] tree, int node, int start, int end){
+        if(start == end){
+            tree[node]=arr[start];
+        }
+        else{
+            init(arr,tree,node*2,start,(start+end)/2);
+            init(arr,tree,node*2+1,(start+end)/2+1,end);
+            tree[node]=tree[node*2]+tree[node*2+1];
+        }
+    }
+
+    static long query(long[] tree, int node, int start, int end, int left, int right) {
+        if (left > end || right < start) {
+            return 0;
+        }
+        if (left <= start && end <= right) {
+            return tree[node];
+        }
+        long lsum = query(tree, node*2, start, (start+end)/2, left, right);
+        long rsum = query(tree, node*2+1, (start+end)/2+1, end, left, right);
+        return lsum+rsum;
+    }
+
+    static void update(long[] arr, long[] tree, int node, int start, int end, int index, long val) {
+        if (index < start || index > end) {
+            return;
+        }
+        if (start == end) {
+            arr[index] = val;
+            tree[node] = val;
+            return;
+        }
+        update(arr, tree,node*2, start, (start+end)/2, index, val);
+        update(arr, tree,node*2+1, (start+end)/2+1, end, index, val);
+        tree[node] = tree[node*2] + tree[node*2+1];
+    }
+}
+
+```