#include "printlib.h"

int main() {
  int num, result, i;
  int prev1, prev2, tmp;
  result = -1;
  num = 15;

  if (num < 2) {
      result = num;
  } else {
      prev1 = 1;
      prev2 = 0;
      for i=2 to num {
          tmp = prev1;
          prev1 = prev1 + prev2;
          prev2 = tmp;
      }
      result = prev1+prev2;
  }
  println_int(result);
  return 0;
}

// SKIP TEST EXPECTED
// EXPECTED
// 610