import sys
input=lambda: sys.stdin.readline().rstrip()

p=int(input())
D=[[[0]*3 for i in range(2)] for j in range(p+1)]
D[0][0][0]=1
for i in range(p):
  D[i+1][0][0]=3*D[i][0][0]+3*D[i][0][1]+3*D[i][0][2]
  D[i+1][0][1]=3*D[i][0][0]+3*D[i][0][1]+3*D[i][0][2]
  D[i+1][0][2]=3*D[i][0][0]+3*D[i][0][1]+3*D[i][0][2]
  D[i+1][1][0]=4*D[i][1][0]+3*D[i][1][1]+3*D[i][1][2]+D[i][0][0]
  D[i+1][1][1]=3*D[i][1][0]+4*D[i][1][1]+3*D[i][1][2]+D[i][0][1]
  D[i+1][1][2]=3*D[i][1][0]+3*D[i][1][1]+4*D[i][1][2]+D[i][0][2]
ans=10**p//3
print(ans+sum(D[p][1])-D[p][1][0])