// https://omegaup.com/arena/problem/Cuenta-de-digitos 
#include <stdio.h> 
 
int main( ) { 
   int n, divisiones = 0; 
   scanf("%d", &n); 
 
   do { 
      n /= 10; 
      divisiones += 1; 
   } while (n != 0); 
 
   printf("%d", divisiones); 
}