题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <iostream>
#include <map>
using namespace std;
int main() {
string n;
cin>>n;
int count=0;
map<char,int> m;
for(int i=0;i<n.length();i++)
{
if(m.count(n[i])==0&&n[i]>=0&&n[i]<=127) count++;
m[n[i]]=1;
}
cout<<count;
}
// 64 位输出请用 printf("%lld")