"""
The game mode is: REVERSE. You do not have access to the statement.
Test 1 -
Provided Input
6
Expected Output
3600
Test 2 -
Provided Input
12
Expected Output
14400
Test 3 -
Provided Input
20
Expected Output
40000
Test 4 -
Provided Input
1
Expected Output
100
Test 5 -
Provided Input
9
Expected Output
8100
"""
n = int(input())
print((n * 10) ** 2)
