Задание 24. Информатика. ЕГЭ. Поляков-7197

Python

s = open('7193.txt').readline().strip()
p_ch = {'X': [], 'Y': [], 'Z': []}
count_ch = {'X': 0, 'Y': 0, 'Z': 0}
ml = 0
p_begin = 0

for p in range(len(s)):
    if s[p] in 'XYZ':
        count_ch[s[p]] += 1
        p_ch[s[p]].append(p)

    if any(count_ch[ch] > 3 for ch in 'XYZ'):
        ml = max(ml, p - p_begin)
        p_begin = p_ch[s[p]].pop(0) + 1
        for c in 'XYZ':
            p_ch[c] = [t for t in p_ch[c] if t >= p_begin]
            count_ch[c] = len(p_ch[c])

ml = max(ml, len(s) - p_begin)
print(ml)

Ответ: \(213\)