'commit'

TangDou/LanQiaoBei/LanQiao14STEMA202208/3_0.cpp

@@ -0,0 +1,18 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+string str = "cacd";
+// 3
+int bucket[26];
+int cnt;
+int main() {
+    //桶计数
+    for (int i = 0; i < str.size(); i++) bucket[str[i] - 'a']++;
+    for (int i = 0; i < 26; i++)
+        if (bucket[i]) cnt++;
+
+    cout << cnt << endl;
+
+    // t.size()!=cnt
+    return 0;
+}