CT_366

Author: Jade-Good

BOJ/Java/src/S5/Boj_1769_3의배수.java

@@ -0,0 +1,30 @@
+package S5;
+
+import java.io.*;
+import java.math.BigInteger;
+
+public class Boj_1769_3의배수 {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        StringBuilder sb = new StringBuilder();
+
+        char[] num = br.readLine().toCharArray();
+        int cnt = 0;
+
+        while (num.length > 1) {
+            cnt++;
+            BigInteger sum = BigInteger.ZERO;
+
+            for (char c : num) {
+                sum = sum.add(new BigInteger(String.valueOf(c)));
+            }
+
+            num = sum.toString().toCharArray();
+        }
+
+        sb.append(cnt).append('\n').append(Integer.parseInt(String.copyValueOf(num)) % 3 == 0 ? "YES" : "NO");
+        bw.write(sb.toString());
+        bw.flush();
+    }
+}