题解

#include<iostream>
using namespace std;
int main(){
	string s;
    int l=0,d=0,o=0;
    getline(cin,s);
    for (int i=0;s[i]!='?';i++){
	    if(s[i]>='a' && s[i]<='z'){
	        l++;
	    }
		else if(s[i]>='0' && s[i]<='9'){
	        d++;
	    }
		else{
	        o++;
		}
	}
    cout<<"Letters="<<l<<endl;
    cout<<"Digits="<<d<<endl;
    cout<<"Others="<<o<<endl;
    return 0;
}