import sys for line in sys.stdin: a = line.split() n = int(a[0]) d = dict() def dp(s, e): if s >= e : return 1 t = 0 for i in range(s, e+1): if (s, i-1) in d: l = d[(s, i-1)] else: l = dp(s, i-1) d[(s, i-1)] = l ...