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[AtCoder]ABC-098|B - Cut and Count
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提出結果
def getInt():
return int(input())
def getString():
return input()
def main():
n = getInt()
s = list(getString())
r = 0
for i in range(1, len(s)):
a = set(s[0:i])
b = set(s[i:])
c = 0
for j in a:
if j in b:
c += 1
r = c if c > r else r
print(r)
if __name__ == "__main__":
main()
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