From bc7946498406be13c6e46b1d2fb9bd80dc4e55bd Mon Sep 17 00:00:00 2001
From: unknown <rkdtmdals999@naver.com>
Date: Sun, 31 Dec 2023 01:36:34 +0900
Subject: [PATCH] Update 2023.12.31

---
 Silver_I/1527.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Silver_I/1527.py

diff --git a/Silver_I/1527.py b/Silver_I/1527.py
new file mode 100644
index 0000000..d342e62
--- /dev/null
+++ b/Silver_I/1527.py
@@ -0,0 +1,23 @@
+# 금민수의 개수
+
+def count_gumminsu(A, B):
+    def generate_gumminsu(n):
+        # 금민수를 생성하는 함수
+        if n > B:
+            return 0
+        count = 0
+        if n >= A:
+            count += 1
+        count += generate_gumminsu(n * 10 + 4)  # 4를 추가한 경우
+        count += generate_gumminsu(n * 10 + 7)  # 7을 추가한 경우
+        return count
+
+    result = generate_gumminsu(0)
+    return result
+
+# 입력 받기
+A, B = map(int, input().split())
+
+# 금민수 개수 출력
+result = count_gumminsu(A, B)
+print(result)
\ No newline at end of file