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#include <bits/stdc++.h>
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using namespace std;
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string str = "cacd";
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// 3
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int bucket[26];
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int cnt;
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int main() {
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//桶计数
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for (int i = 0; i < str.size(); i++) bucket[str[i] - 'a']++;
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for (int i = 0; i < 26; i++)
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if (bucket[i]) cnt++;
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cout << cnt << endl;
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// t.size()!=cnt
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return 0;
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} |
