#include <iostream>
#include <iomanip>
using namespace std;
int ggg (int n,int ans=0)
{
if (n == 0) {
ans = 1;
}
while (n != 0) {
n /= 10;
++ans; }
return ans;
}
int main ()
{
int n, ans ;
cin >> n;
cout <<ggg (n);
}
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