题解

#include <bits/stdc++.h>
using namespace std;
string s;
int letter,number,other;

int main()
{
getline(cin,s);
for(int i=0;i<s.size()-1;i++)
{
if(s[i]>='0'&&s[i]<='9') number++;
else if(s[i]>='a'&&s[i]<='z') letter++;
else other++;
}
cout<<"Letters="<<letter<<endl;
cout<<"Digits="<<number<<endl;
cout<<"Others="<<other<<endl;
return 0;
}