# equisum4-q16
# Sections 1-5, Q.16, p.13 and p.247
# timeit.bat equisum4.py == 187 usec

import time

start = time.time_ns()
count= 0
for s in range(14):
  p = 0
  for a in range(10):
    for b in range(10):
      if (a+b <= s) and (a+b >= s-9):
        p = p+1
  count += p*p
print(2*count, "in", time.time_ns()-start, "nanosecs")