Eaaaaaasy!!!!!!

#include <bits/stdc++.h>
using namespace std;
int main(){
    char s[260];
    gets(s);
    int len = strlen(s);
    int count = 0;
    for(int i = 0; i < len; i++){
        if(s[i] >= '0' && s[i] <= '9'){
            count++;
        }
    }
    cout << count;
    return 0;
}