import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	if N == 1:
		print(2)
		return

	ans = 1
	if N % 2 == 0:
		ans *= 4
		ans *= pow(5, int(N // 2) - 1, con)
		ans %= con

		print(ans)

	else:
		ans *= 4
		ans *= pow(5, int(N // 2) - 1, con)
		ans *= 3
		ans %= con
		print(ans)

if __name__ == '__main__':
	main()