Submission #19485351

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Source Code Expand

n=int(input())
#a=list(map(str,input().split()))

#a,b = map(int,input().split())
s=input()
#d=[int(input()) for i in range(n)]
#a=list(map(int,input().split()))

l=0
for i in range(n-1):
    u=[]
    for x in s[:i+1]:
        for y in s[i+1:]:
            if ((x==y) and (x not in u)):
                u.append(x)
    l=max(l,len(u))
print(l)

Submission Info

Judge Result