题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <iostream>
#include <set>
#include <string>
using namespace std;
int main()
{
string s;
getline(cin, s);
set<char> myset;
for (char c : s)
{
myset.insert(c);
}
cout << myset.size() << endl;
}
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