题解 | 自守数
def isSelfNum(n): size=len(str(n)) if str(n*n)[-size:]==str(n): return True n=int(input()) c=0 for i in range(n+1): if isSelfNum(i): c+=1 print(c)
def isSelfNum(n): size=len(str(n)) if str(n*n)[-size:]==str(n): return True n=int(input()) c=0 for i in range(n+1): if isSelfNum(i): c+=1 print(c)
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