20250718 baekjoon

code_study/Baekjoon/python/17626.py

@@ -0,0 +1,31 @@
+# n = int(input())
+# dp = [0] + [1 if i**0.5 % 1 == 0 else 0 for i in range(1,n+1)]
+# for i in range(2,n+1):
+#     if dp[i] :
+#         continue
+#     k = 1
+#     while k*k <= i :
+#         if not dp[i] :
+#             dp[i] = dp[i-k*k] + 1
+#         else :
+#             dp[i] = min(dp[i], dp[i-k*k] + 1)
+#         k += 1
+# print(dp[n])
+
+n = int(input())
+if n**0.5%1 == 0 :
+    print(1)
+else :
+    k = 1
+    flag = False
+    while k*k <= n :
+        if (n - k*k)**0.5%1 == 0 :
+            print(2)
+            flag = True
+            break
+        k += 1
+
+    if not flag :
+        while not n%4 :
+            n //= 4
+        print(4 if n%8==7 else 3)