import math
num = int(input("Enter a Decimal Number: "));
copyNum = num
arr = [0]*50
answer = [0]*50
value = 1
count = -1
j = 0
while(copyNum > value):
count += 1
value = math.pow(8, count);
arr[count] = value;
count -= 1
for i in range(count, -1, -1):
answer[j] = math.floor(copyNum / arr[i])
j += 1
copyNum = copyNum % arr[i]
print("Octal number of %d (decimal) is " % num, end="")
for i in range(0, count+1):
print(answer[i], end="")