题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <iostream>
#include <set>
using namespace std;
int main() {
set<string> s;
string s1;
cin >> s1;
for (int i=0; i< s1.length(); i++)
{
s.insert(s1.substr(i,1));
}
cout << s.size();
return 0;
}
