Задание 24. Информатика. ЕГЭ. Поляков-8004

Python

from re import finditer

def is_sq(n):
    t = sum(int(ch) for ch in n)
    if int(t ** 0.5) ** 2 == t:
        return True
    return False

s = open('7993.txt').readline().strip()
arr = []
n = r'(0|[1-9][0-9]*)'
for g in finditer(rf'{n}(={n})+', s):
    tmp = g.group(0).split('=')
    lt = len(tmp)
    if any(len(x) == 10 and is_sq(x) for x in tmp):
        arr.append(len(g.group(0)))
    else:
        tmp1 = g.group(0)[::-1].split('=')
        lt = len(tmp)
        for k, t in enumerate((tmp, tmp1)):
            for i in range(lt - 1):
                curr = t[i]
                if len(curr) > 10:
                    st = curr[-10:] if k == 0 else curr[-10:][::-1]
                    if is_sq(st):
                        stmp = '='.join(t[i+1:])
                        arr.append(len(stmp) + 11)
print(max(arr))

Ответ: \(961\)