#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[226]; int b=0; cin>>a; int i=0; while(a[i]!='\0'){ if(isdigit(a[i])){ b=b+1; } i++; } cout<<b; return 0; }