#include<bits/stdc++.h> using namespace std; int main() { char a[1000001]={}; int a1=0,sum=0; cin.getline(a,1000001); while(a[a1]!='\0') for(int i=0;i<a1;i++){ if(a[i]>='0'&&a[i]<='9'){ sum++; } } cout<<sum; return 0; }