n = int(input())
a = 2 * 3 * 4 ** (n - 3)
b = (n - 3) * 9 * 4 ** (n - 4)
print(round(4 * (a + b)))
74. Search a 2D Matrix | 71. Simplify Path |
62. Unique Paths | 50. Pow(x, n) |
43. Multiply Strings | 34. Find First and Last Position of Element in Sorted Array |
33. Search in Rotated Sorted Array | 17. Letter Combinations of a Phone Number |
5. Longest Palindromic Substring | 3. Longest Substring Without Repeating Characters |
1312. Minimum Insertion Steps to Make a String Palindrome | 1092. Shortest Common Supersequence |
1044. Longest Duplicate Substring | 1032. Stream of Characters |
987. Vertical Order Traversal of a Binary Tree | 952. Largest Component Size by Common Factor |
212. Word Search II | 174. Dungeon Game |
127. Word Ladder | 123. Best Time to Buy and Sell Stock III |
85. Maximal Rectangle | 84. Largest Rectangle in Histogram |
60. Permutation Sequence | 42. Trapping Rain Water |
32. Longest Valid Parentheses | Cutting a material |
Bubble Sort | Number of triangles |
AND path in a binary tree | Factorial equations |