#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char s[226]; int x=0,a=0; cin>>s; for(int i=0;s[i]!='\0';i++) x++; for(int i=0;i<x;i++){ if(s[i]>='0' && s[i]<='9') a++; } cout<<a; return 0; }