# equisum3-q16
# Sections 1-5, Q.16, p.13 and p.247
# timeit.bat equisum3.py == 406 usec

import time

start = time.time_ns()
count = 0
for s in range(28):
  p = 0
  for a in range(10):
    for b in range(10):
      if (a+b <= s) and (a+b >= s-9):
        p += 1
  count += p*p
print(count, "in", time.time_ns()-start, "nanosecs")