diff --git a/minzino/java/src/main/java/org/example/feb/bj20310/Main.java b/minzino/java/src/main/java/org/example/feb/backjoon/bj20310/Main.java
similarity index 95%
rename from minzino/java/src/main/java/org/example/feb/bj20310/Main.java
rename to minzino/java/src/main/java/org/example/feb/backjoon/bj20310/Main.java
index 8a20eef..4b08448 100644
--- a/minzino/java/src/main/java/org/example/feb/bj20310/Main.java
+++ b/minzino/java/src/main/java/org/example/feb/backjoon/bj20310/Main.java
@@ -1,4 +1,4 @@
-package main.java.org.example.feb.bj20310;
+package main.java.org.example.feb.backjoon.bj20310;
 
 import java.io.BufferedReader;
 import java.io.IOException;
diff --git "a/minzino/java/src/main/java/org/example/feb/programmers/\354\231\270\353\262\275_\354\240\220\352\262\200/Solution.java" "b/minzino/java/src/main/java/org/example/feb/programmers/\354\231\270\353\262\275_\354\240\220\352\262\200/Solution.java"
new file mode 100644
index 0000000..ba37350
--- /dev/null
+++ "b/minzino/java/src/main/java/org/example/feb/programmers/\354\231\270\353\262\275_\354\240\220\352\262\200/Solution.java"
@@ -0,0 +1,69 @@
+package main.java.org.example.feb.programmers.외벽_점검;
+
+public class Solution {
+    int[] weak, dist;
+    int[][] weak_cases;
+    int n, answer;
+
+    public int solution(int n, int[] weak, int[] dist) {
+        weak_cases = new int[weak.length][weak.length];
+        this.weak = weak;
+        this.dist = dist;
+        this.answer = dist.length+1;
+        this.n = n;
+
+
+        makeWeakCases();
+        makeDistCases(new boolean[dist.length], new int[dist.length], 0);
+        if(answer == dist.length+1)
+            return -1;
+        else
+            return answer;
+    }
+
+    void makeWeakCases(){
+        int[] weak_case = this.weak.clone();
+        weak_cases[0] = weak_case.clone();
+        for(int i = 1; i < weak.length; i++){
+            int temp = weak_case[0];
+            for(int j = 1; j < weak.length; j++){
+                weak_case[j-1] = weak_case[j];
+            }
+            weak_case[weak.length-1] = temp+n;
+            weak_cases[i] = weak_case.clone();
+        }
+    }
+
+    void makeDistCases(boolean[] dist_visit, int[] dist_case, int idx){
+        if(idx == dist.length){
+            for(int[] weak_case: weak_cases)
+                check(dist_case, weak_case);
+        }
+        for(int i = 0; i < dist.length; i++){
+            if(!dist_visit[i]){
+                dist_visit[i] = true;
+                dist_case[idx] = dist[i];
+                makeDistCases(dist_visit, dist_case, idx+1);
+                dist_case[idx] = 0;
+                dist_visit[i] = false;
+            }
+        }
+    }
+
+    void check(int[] dist_case, int[] weak_case){
+        int cur = 0, next;
+        int dist_idx = 0;
+        while(cur < weak_case.length && dist_idx < dist_case.length){
+            next = cur+1;
+            while(next < weak_case.length &&
+                    weak_case[cur] + dist_case[dist_idx] >= weak_case[next]){
+                next++;
+            }
+            cur = next;
+            dist_idx++;
+        }
+
+        if(cur == weak_case.length && dist_idx < answer)
+            answer = dist_idx;
+    }
+}