diff --git a/Security.java b/Security.java
new file mode 100644
index 0000000..3c07854
--- /dev/null
+++ b/Security.java
@@ -0,0 +1,81 @@
+// 백준_2564
+// 2021.04.11
+// 구현, case work
+// brute force
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.StringTokenizer;
+
+public class Security {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int square[] = {Integer.valueOf(st.nextToken()), Integer.valueOf(st.nextToken())};
+        st = new StringTokenizer(br.readLine());
+        int N = Integer.valueOf(st.nextToken());
+        int[][] shops = new int[N][2];
+        int[] home = new int[2];
+        int answer = 0;
+
+        for (int i = 0; i < shops.length; i++) {
+            st = new StringTokenizer(br.readLine());
+            shops[i][0] = Integer.valueOf(st.nextToken());
+            shops[i][1] = Integer.valueOf(st.nextToken());
+        }
+        st = new StringTokenizer(br.readLine());
+        home[0] = Integer.valueOf(st.nextToken());
+        home[1] = Integer.valueOf(st.nextToken());
+
+        if (home[0] / 2 <= 1) {
+            for (int i = 0; i < shops.length; i++) {
+                if(home[0] == shops[i][0])
+                    answer += Math.abs(home[1] - shops[i][1]);
+                if (home[0] + shops[i][0] == 3) {
+                    answer += square[1];
+                    answer += Math.min(shops[i][1] + home[1], square[0] * 2 - (shops[i][1] + home[1]));
+                } else {
+                    if (shops[i][0] == 3) {
+                        if (home[0] == 1)
+                            answer += shops[i][1];
+                        else if (home[0] == 2)
+                            answer += (square[1] - shops[i][1]);
+                        answer += home[1];
+                    } else if (shops[i][0] == 4) {
+                        if (home[0] == 1)
+                            answer += shops[i][1];
+                        else if (home[0] == 2)
+                            answer += square[1] - shops[i][1];
+                        answer += (square[0] - home[1]);
+                    }
+                }
+            }
+        } else {
+            for (int i = 0; i < shops.length; i++) {
+                if(home[0] == shops[i][0])
+                    answer += Math.abs(home[1] - shops[i][1]);
+                if (home[0] + shops[i][0] == 7 ) {
+                    answer += square[0];
+                    answer += Math.min(shops[i][1] + home[1], square[1] * 2 - (shops[i][1] + home[1]));
+                } else {
+                    if (shops[i][0] == 1) {
+                        if (home[0] == 3)
+                            answer += shops[i][1];
+                        else if (home[0] == 4)
+                            answer += (square[0] - shops[i][1]);
+                        answer += home[1];
+                    } else if (shops[i][0] == 2) {
+                        if (home[0] == 3)
+                            answer += shops[i][1];
+                        else if (home[0] == 4)
+                            answer += square[1] - shops[i][1];
+                        answer += (square[1] - home[1]);
+                    }
+                }
+            }
+        }
+
+        System.out.println(answer);
+    }
+}