#include<iostream> #include<cstdio> #include<cstring> using namespace std; int main(){ int n; int m = 0; string s2; getline(cin,s2); n = s2.size(); for(int i=0;i<n;i++){ if(s2[i]>='0'&& s2[i]<='9'){ m++; } } cout<<m; return 0; }