return (k == 0) ? 1 : 0;
      case 1:
        return 1;
      case (-1):
        return ((k & 1) == 0) ? 1 : -1;
      case 2:
        checkNoOverflow(k < Integer.SIZE - 1, "checkedPow", b, k);
        return 1 << k;
      case (-2):
        checkNoOverflow(k < Integer.SIZE, "checkedPow", b, k);
        return ((k & 1) == 0) ? 1 << k : -1 << k;
      default:
        // continue below to handle the general case

        return (k == 0) ? 1 : 0;
      case 1:
        return 1;
      case (-1):
        return ((k & 1) == 0) ? 1 : -1;
      case 2:
        checkNoOverflow(k < Integer.SIZE - 1, "checkedPow", b, k);
        return 1 << k;
      case (-2):
        checkNoOverflow(k < Integer.SIZE, "checkedPow", b, k);
        return ((k & 1) == 0) ? 1 << k : -1 << k;
      default:
        // continue below to handle the general case

     */
    if (leadingZeros > Long.SIZE + 1) {
      return a * b;
    }
    checkNoOverflow(leadingZeros >= Long.SIZE, "checkedMultiply", a, b);
    checkNoOverflow(a >= 0 | b != Long.MIN_VALUE, "checkedMultiply", a, b);
    long result = a * b;
    checkNoOverflow(a == 0 || result / a == b, "checkedMultiply", a, b);
    return result;
  }

  /**

     */
    if (leadingZeros > Long.SIZE + 1) {
      return a * b;
    }
    checkNoOverflow(leadingZeros >= Long.SIZE, "checkedMultiply", a, b);
    checkNoOverflow(a >= 0 | b != Long.MIN_VALUE, "checkedMultiply", a, b);
    long result = a * b;
    checkNoOverflow(a == 0 || result / a == b, "checkedMultiply", a, b);
    return result;
  }

  /**

      length += array.length;
    }
    long[] result = new long[checkNoOverflow(length)];
    int pos = 0;
    for (long[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

  private static int checkNoOverflow(long result) {
    checkArgument(
        result == (int) result,

      length += array.length;
    }
    long[] result = new long[checkNoOverflow(length)];
    int pos = 0;
    for (long[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

  private static int checkNoOverflow(long result) {
    checkArgument(
        result == (int) result,