import sys def f(n, m): if n <= 0 or m <= 0: return 1 return f(n, m-1) + f(n-1, m) for line in sys.stdin.readlines(): n, m = (int(x) for x in line.split()) print(f(n, m))
import sys def f(n, m): if n <= 0 or m <= 0: return 1 return f(n, m-1) + f(n-1, m) for line in sys.stdin.readlines(): n, m = (int(x) for x in line.split()) print(f(n, m))