// g++ -O2 -Wall -Wextra -pedantic -s -o ll ll.cc -ldstr

#include <Dstr>

int main() {
  Dstr buf;
  unsigned mlen = 0;
  while (!(buf.getline(stdin).isNull()))
    if (buf.length() > mlen)
      mlen = buf.length();
  printf ("%u\n", mlen);
  return 0;
}