题解

``#include <bits/stdc++.h>
using namespace std;
string s;
int main(){
getline (cin,s);
int sum=0;
int len =s.size();
for(int i=0;i<=len-1;i++)
{
if(s[i]>='0' and s[i]<='9')
{
sum++;
}
}
cout<<sum;
return 0;
}`cpp