#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
from math import factorial as fact

# %%
N = int(read())

# %%
if N < 5:
    print(0)
    exit()

# %%
den = fact(99) // fact(N)
num = fact(94) // fact(N - 5)
p = num / den
answer = p * 12
print(answer)