k = int(input())
if k == 1:
print(4)
elif (k % 2 == 0):
tmp = (k + 2) // 2
print(tmp**2)
else:
print((k+1)*(k+3)//2)1609C - Complex Market Analysis | 1657E - Star MST |
1143B - Nirvana | 1285A - Mezo Playing Zoma |
919B - Perfect Number | 894A - QAQ |
1551A - Polycarp and Coins | 313A - Ilya and Bank Account |
1469A - Regular Bracket Sequence | 919C - Seat Arrangements |
1634A - Reverse and Concatenate | 1619C - Wrong Addition |
1437A - Marketing Scheme | 1473B - String LCM |
1374A - Required Remainder | 1265E - Beautiful Mirrors |
1296A - Array with Odd Sum | 1385A - Three Pairwise Maximums |
911A - Nearest Minimums | 102B - Sum of Digits |
707A - Brain's Photos | 1331B - Limericks |
305B - Continued Fractions | 1165B - Polycarp Training |
1646C - Factorials and Powers of Two | 596A - Wilbur and Swimming Pool |
1462B - Last Year's Substring | 1608B - Build the Permutation |
1505A - Is it rated - 2 | 169A - Chores |