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19 lines
399 B
C++
19 lines
399 B
C++
#include <algorithm>
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#include <cctype>
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#include <cstdio>
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#include <set>
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int n;
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char str[201];
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int main()
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{
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scanf("%d%s", &n, str);
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std::set<char> S;
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int ans = 0;
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for (int pos = 0; pos <= n; pos++)
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if (islower(str[pos]))
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S.insert(str[pos]);
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else
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ans = std::max(ans, static_cast<int>(S.size())), S.clear();
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printf("%d", ans);
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return 0;
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} |