025.cpp

#include <stdio.h>
#include "lib/big_num.h"

int main(int argc, char** argv)
{
  int count = 2,
      targetSize = 1000;

  BigNum *a = new BigNum(1),
         *b = new BigNum(1);

  while (a->size() < targetSize && b->size() < targetSize) {
    if (count % 2 == 0)
      a->add(b);
    else
      b->add(a);

    count++;
  };

  printf("%i\n", count);

  return 0;
}