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- file = open('18.txt')
- s = file.readline()
- l = 0
- kd = 0
- ans = 0
- for r in range(1, len(s)):
- if s[r] == 'D':
- kd += 1
- while kd >= 2:
- if s[l] == 'D':
- kd -= 1
- l += 1
- ans = max(ans, r - l + 1)
- print(ans)
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