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c=0
for i in 1..10000
¡¡¡¡if i%11==0 && i.digits==i.digits.reverse
¡¡¡¡¡¡c+=1
¡¡¡¡end
end
p c
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def is_palindrome(n):
¡¡¡¡return str(n)==str(n)[::-1]
def find_numbers():
¡¡¡¡results=[]
¡¡¡¡for num in range(1,10001):
¡¡¡¡¡¡¡¡if num%11==0 and num%10!=0 and is_palindrome(num):
¡¡¡¡¡¡¡¡¡¡¡¡results.append(num)
¡¡¡¡return results
numbers=find_numbers()
print(f"¾ò·ï¤òËþ¤¿¤¹¿ô¤ÏÁ´Éô¤Ç{len(numbers)}¸Ä¤Ç¤¹¡£")
print("¤½¤ì¤é¤Î¤¹¤¦¤Ï¤Ä¤®¤Î¤È¤ª¤ê¤Ç¤¹:")
print(numbers)
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for a=1 to 9
for b=0 to 9
if a=b and mod(10*a+b,11)=0 then let s1=s1+1
for c=0 to 9
if a=c and mod(10^2*a+10*b+c,11)=0 then let s2=s2+1
for d=1 to 9
if a=d and b=c and mod(10^3*a+10^2*b+10*c+d,11)=0 then let s3=s3+1
next d
next c
next b
next a
print s1;"+";s2;"+";s3;"=";s1+s2+s3;"¡¦¡¦¡¦¡¦¡¦¡¦(Åú¤¨)"
end

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# ²óʸ¿ô¤òÀ¸À®¤·¡¢¾ò·ï¤òËþ¤¿¤¹¤â¤Î¤ò¥«¥¦¥ó¥È¤¹¤ë
count = 0

# 1·å¤Î²óʸ¿ô¡Ê1~9¡Ë
for i in range(1, 10):
if i % 11 == 0:
count += 1

# 2·å¤Î²óʸ¿ô¡Ê11, 22, ..., 99¡Ë
for i in range(1, 10):
num = i * 11
if num % 11 == 0 and num <= 10000 and num % 10 != 0:
count += 1

# 3·å¤Î²óʸ¿ô¡Ê101, 111, ..., 999¡Ë
for i in range(1, 10):
for j in range(10):
num = 101 * i + 10 * j
if num % 11 == 0 and num <= 10000 and num % 10 != 0:
count += 1

# 4·å¤Î²óʸ¿ô¡Ê1001, 1111, ..., 9999¡Ë
for i in range(1, 10):
for j in range(10):
num = 1001 * i + 110 * j
if num % 11 == 0 and num <= 10000 and num % 10 != 0:
count += 1

print(count)
¡¡¡¡ 7·î20Æü¡ÊÅÚ¡Ë 0:52:58¡¡¡¡ ¡¡¡¡53543
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¡¡¡¡ 7·î20Æü¡ÊÅÚ¡Ë 10:10:28¡¡¡¡ ¡¡¡¡53544
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p (1..9999).select{|i|i%11==0 and i.to_s.reverse.to_i == i}.size
¤ª¤¦¤Á¡¡¡¡ 7·î20Æü¡ÊÅÚ¡Ë 11:43:47¡¡¡¡ ¡¡¡¡53545
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added1=[]
for i in range(1,10):
¡¡¡¡for j in range(10):
¡¡¡¡¡¡¡¡number1=int(f"{i}{j}")
¡¡¡¡¡¡¡¡if number1%11==0 and number1%10!=0 and number1==int(f"{j}{i}"):
¡¡¡¡¡¡¡¡¡¡¡¡added1.append(number1)
added2=[]
for k in range(1,10):
¡¡¡¡for l in range(10):
¡¡¡¡¡¡¡¡for m in range(10):
¡¡¡¡¡¡¡¡¡¡¡¡number2=int(f"{k}{l}{m}")
¡¡¡¡¡¡¡¡¡¡¡¡if number2%11==0 and number2%10!=0 and number2==int(f"{m}{l}{k}"):
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡added2.append(number2)
added3=[]
for n in range(1,10):
¡¡¡¡for o in range(10):
¡¡¡¡¡¡¡¡for p in range(10):
¡¡¡¡¡¡¡¡¡¡¡¡for q in range(10):
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡number3=int(f"{n}{o}{p}{q}")
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡if number3%11==0 and number3%10!=0 and number3==int(f"{q}{p}{o}{n}"):
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡added3.append(number3)
print(added1)
print(added2)
print(added3)
print(len(added1)+len(added2)+len(added3))
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def is_palindrome(n):
¡¡¡¡return str(n)==str(n)[::-1]
def find_numbers():
¡¡¡¡count=0
¡¡¡¡for i in range(1,10001):
¡¡¡¡¡¡¡¡if i%11==0 and i%10!=0 and is_palindrome(i):
¡¡¡¡¡¡¡¡¡¡¡¡count+=1
¡¡¡¡retrn count
total_numbers=finf_numbers()
print(total_numbers)
¡¡¡¡ 7·î21Æü¡ÊÆü¡Ë 15:52:35¡¡¡¡ ¡¡¡¡53547
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p 11.step(9999,11).select{|i|i.to_s.reverse.to_i == i}.size
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