Задание 24. Информатика. ЕГЭ. Поляков-7993

Python

from re import finditer

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(x == y for x, y in zip(tmp, tmp[1:])):
        arr.append(len(g.group(0)))
    else:
        tmp1 = g.group(0)[::-1].split('=')
        lt = len(tmp)
        for t in (tmp, tmp1):
            for i in range(1, lt):
                prev, curr = t[i-1], t[i]
                lp, lc = len(prev), len(curr)
                if lp > lc and prev[-lc:] == curr:
                    stmp = prev[-lc:] + '=' + '='.join(t[i:])
                    arr.append(len(stmp))
print(max(arr))

Ответ: \(989\)