내풀이

Author: seongdong2

프로그래머스/약수 갯수의 덧셈 뺄셈.py

@@ -0,0 +1,31 @@
+def solution(left, right):
+    answer = 0
+    
+    def count(x):
+        cnt=0
+        
+        if x == 1:
+            return 1
+        
+        
+        for i in range(1, ((x+1)//2)+1):
+            if x%i == 0:
+                cnt += 1
+        
+        if cnt % 2 != 0:
+            cnt -= 1
+            cnt *= 2
+            cnt += 1
+        else :
+            cnt *=2
+        
+        return cnt+2
+            
+        
+    for num in range(left, right+1):
+        if count(num) % 2 == 0:
+            answer -= num
+        else: 
+            answer += num
+    
+    return answer