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- file = open('24.txt')
- s = file.readline()
- l = 2
- k = 0
- ans = 10**10
- for r in range(2, len(s)):
- if s[r-2:r+1] == 'BAD' or s[r-2:r+1] == 'FAT':
- k += 1
- while k >= 3:
- if s[l-2:l+1] == 'BAD' or s[l-2:l+1] == 'FAT':
- k -= 1
- l += 1
- ans = min(ans, r - l + 1)
- print(ans)
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