[#3] 2021.12.16 백준단계별 6. 함수

Boj/함수/1065.py

@@ -0,0 +1,23 @@
+n = int(input())
+result = 0
+
+# 한수를 판단하는 함수
+def d(k):
+    k_list = list(map(int, str(k)))
+    if len(k_list) < 3:
+        return True
+    elif len(k_list) == 3:
+        if k_list[1]-k_list[0] == k_list[2]-k_list[1]:
+            return True
+        else:
+            return False
+    else:
+        return False
+
+
+for i in range(1, n+1):
+    # if 한수면 -> result + 1
+    if d(i) == True:
+        result = result + 1
+
+print(result)

Boj/함수/15596.py

@@ -0,0 +1,5 @@
+def solve(a):
+    sum = 0
+    for i in a:
+        sum = sum + i
+    return sum

Boj/함수/4673.py

@@ -0,0 +1,24 @@
+def d(n):
+    result = n
+    for i in str(n):
+        result = result + int(i)
+    return result
+
+ans = []
+
+# ans = [1, 2, 3, ...]
+for i in range(0, 10000):
+    ans.append(i+1)
+
+
+for i in range(1, 10000):
+    k = d(i)
+    if k > 10000:
+        continue
+    else:
+        ans[k-1] = 0
+
+# 정답 출력
+for i in ans:
+    if i != 0:
+        print(i)