n = int(input())
print((pow(3, n * 3) - pow(7, n)) % (pow(10, 9) + 7))
1704. Determine if String Halves Are Alike | 1732. Find the Highest Altitude |
709. To Lower Case | 1688. Count of Matches in Tournament |
1684. Count the Number of Consistent Strings | 1588. Sum of All Odd Length Subarrays |
1662. Check If Two String Arrays are Equivalent | 1832. Check if the Sentence Is Pangram |
1678. Goal Parser Interpretation | 1389. Create Target Array in the Given Order |
1313. Decompress Run-Length Encoded List | 1281. Subtract the Product and Sum of Digits of an Integer |
1342. Number of Steps to Reduce a Number to Zero | 1528. Shuffle String |
1365. How Many Numbers Are Smaller Than the Current Number | 771. Jewels and Stones |
1512. Number of Good Pairs | 672. Richest Customer Wealth |
1470. Shuffle the Array | 1431. Kids With the Greatest Number of Candies |
1480. Running Sum of 1d Array | 682. Baseball Game |
496. Next Greater Element I | 232. Implement Queue using Stacks |
844. Backspace String Compare | 20. Valid Parentheses |
746. Min Cost Climbing Stairs | 392. Is Subsequence |
70. Climbing Stairs | 53. Maximum Subarray |