题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <bits/stdc++.h>
using namespace std;
int main() {
string s;
cin >> s;
set<char> m_set;
int count = 0;
for(auto ss : s) {
if(m_set.find(ss) == m_set.end()) {
m_set.insert(ss);
count++;
}
}
cout << m_set.size();
return 0;
}
// 64 位输出请用 printf("%lld")
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