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- file = open('23.txt')
- s = file.readline()
- l = 0
- kx = 0
- ky = 0
- ans = 10**10
- for r in range(len(s)):
- if s[r] == 'X':
- kx += 1
- if s[r] == 'Y':
- ky += 1
- while kx >= 500 and ky == 0:
- if s[l] == 'X':
- kx -= 1
- l += 1
- ans = min(ans, r - l + 1)
- if ky != 0:
- l = r
- ky = 0
- print(ans)
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