diff --git a/src/week10/minesweeper9082/Main.java b/src/week10/minesweeper9082/Main.java
index e9448ab..6b5b7fc 100644
--- a/src/week10/minesweeper9082/Main.java
+++ b/src/week10/minesweeper9082/Main.java
@@ -1,5 +1,25 @@
 package week10.minesweeper9082;
 
-public class Main {
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
 
+public class Main {
+	public static void main(String[] args) throws IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		int T = Integer.parseInt(br.readLine());	// 테스트 케이스의 수
+		for (int tc = 1; tc <= T; tc++) {
+			int sum = 0, ans = 0;	// 주어진 배열의 합, 정답
+			int N = Integer.parseInt(br.readLine());	// 배열의 크기
+			String str = br.readLine();
+			for (int i = 0; i < N; i++) {
+				sum += str.charAt(i) - '0';
+			}
+			ans = sum / 3;
+			if (sum % 3 != 0)
+				ans++;
+			str = br.readLine();
+			System.out.println(ans);
+		}
+	}
 }