From 17427e3f67790f0a7f27196127ae181f495593e2 Mon Sep 17 00:00:00 2001
From: oncsr <khj20006@naver.com>
Date: Sat, 14 Jun 2025 20:58:04 +0900
Subject: [PATCH] =?UTF-8?q?[20250614]=20BOJ=20/=20P3=20/=20=EA=B5=90?=
 =?UTF-8?q?=EC=88=98=EB=8B=98=EC=9D=80=20=EA=B8=B0=EB=8B=A4=EB=A6=AC?=
 =?UTF-8?q?=EC=A7=80=20=EC=95=8A=EB=8A=94=EB=8B=A4=20/=20=EA=B6=8C?=
 =?UTF-8?q?=ED=98=81=EC=A4=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...0 \354\225\212\353\212\224\353\213\244.md" | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 "khj20006/202506/14 BOJ P3 \352\265\220\354\210\230\353\213\230\354\235\200 \352\270\260\353\213\244\353\246\254\354\247\200 \354\225\212\353\212\224\353\213\244.md"

diff --git "a/khj20006/202506/14 BOJ P3 \352\265\220\354\210\230\353\213\230\354\235\200 \352\270\260\353\213\244\353\246\254\354\247\200 \354\225\212\353\212\224\353\213\244.md" "b/khj20006/202506/14 BOJ P3 \352\265\220\354\210\230\353\213\230\354\235\200 \352\270\260\353\213\244\353\246\254\354\247\200 \354\225\212\353\212\224\353\213\244.md"
new file mode 100644
index 00000000..5641701a
--- /dev/null
+++ "b/khj20006/202506/14 BOJ P3 \352\265\220\354\210\230\353\213\230\354\235\200 \352\270\260\353\213\244\353\246\254\354\247\200 \354\225\212\353\212\224\353\213\244.md"	
@@ -0,0 +1,116 @@
+```java
+import java.util.*;
+import java.io.*;
+
+class IOController {
+    BufferedReader br;
+    BufferedWriter bw;
+    StringTokenizer st;
+
+    public IOController() {
+        br = new BufferedReader(new InputStreamReader(System.in));
+        bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        st = new StringTokenizer("");
+    }
+
+    String nextLine() throws Exception {
+        String line = br.readLine();
+        st = new StringTokenizer(line);
+        return line;
+    }
+
+    String nextToken() throws Exception {
+        while (!st.hasMoreTokens()) nextLine();
+        return st.nextToken();
+    }
+
+    int nextInt() throws Exception {
+        return Integer.parseInt(nextToken());
+    }
+
+    long nextLong() throws Exception {
+        return Long.parseLong(nextToken());
+    }
+
+    double nextDouble() throws Exception {
+        return Double.parseDouble(nextToken());
+    }
+
+    void close() throws Exception {
+        bw.flush();
+        bw.close();
+    }
+
+    void write(String content) throws Exception {
+        bw.write(content);
+    }
+
+}
+
+public class Main {
+
+    static IOController io;
+
+    //
+
+    static int N, M;
+    static int[] r;
+    static long[] c;
+
+    public static void main(String[] args) throws Exception {
+
+        io = new IOController();
+
+        while(true) {
+            N = io.nextInt();
+            M = io.nextInt();
+            if(N == 0) break;
+            init();
+            solve();
+        }
+
+        io.close();
+
+    }
+
+    static int f(int x) {
+        if(x == r[x]) return x;
+        int p = f(r[x]);
+        c[x] += c[r[x]];
+        return (r[x] = p);
+    }
+
+    public static void init() throws Exception {
+
+        r = new int[N+1];
+        for(int i=1;i<=N;i++) r[i] = i;
+        c = new long[N+1];
+
+    }
+
+    static void solve() throws Exception {
+
+        while(M-->0) {
+
+            char op = io.nextToken().charAt(0);
+            int a = io.nextInt(), b = io.nextInt();
+
+            if(op == '!') {
+                int w = io.nextInt();
+                int x = f(a), y = f(b);
+                if(x == y) continue;
+                c[y] = c[a]-c[b]+w;
+                r[y] = x;
+            }
+            else {
+                int x = f(a), y = f(b);
+                if(x != y) io.write("UNKNOWN\n");
+                else io.write((c[b] - c[a]) + "\n");
+            }
+
+        }
+
+    }
+
+}
+```