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0465 - Ogl PP
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Sursa: [https://www.pbinfo.ro/probleme/465/oglpp] =Cerinţa== Se dau 2 numere naturale a b, a < b. Determinați câte numere din intervalul [a,b] sunt pătrate perfecte și au proprietatea că oglinditul lor este pătrat perfect. ==Date de intrare== Programul citește de la tastatură numerele a b. ==Date de ieşire== Programul afișează pe ecran numărul C, reprezentând valoarea căutată. ==Restricţii şi precizări== 1 ≤ a < b ≤ 1.000.000.000 ==Exemplu:== Intrare 100 500 Ieșire 7 ==Explicație== Numerele sunt 100 121 144 169 400 441 484. ==Solutie== <syntaxhighlight lang="python" line> def is_square(n): """Verifică dacă n este pătrat perfect.""" return int(n ** 0.5) ** 2 == n def reverse_digits(n): """Inversează cifrele unui număr.""" rev = 0 while n > 0: rev = 10 * rev + n % 10 n //= 10 return rev a, b = map(int, input().split()) count = 0 for num in range(a, b + 1): if is_square(num) and is_square(reverse_digits(num)): count += 1 print(count) </syntaxhighlight>
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