#include <cstring>
#include <iostream>
using namespace std;
int main(){
int i, m, n;
const char* str = "4730 12417 389238";
for( i = n = m = 0; str[i]; i++ ){
if( isdigit(str[i]) )
n++;
else
{
if( m < n )
m = n;
n = 0;
}
}
if( m < n )
m = n;
cout<<"max digit count : "<<m<<endl;
cin.get();
return 0;
}