复赛一：标题统计(title)

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#include<iostream>
#include <string>
using namespace std;

int main(){
    string str;
    int a,n=0;
    getline(cin, str);
    a=str.length();
    for (int i = 0; i <a; i++)
    if((str[i]>='a'&&str[i]<='z')||(str[i]>='A'&&str[i]<='Z')||(str[i]>='0'&&str[i]<='9'))n++;
    cout<<n;
}