1 import sys
2 m,n=list(map(int,sys.stdin.readline().strip().split()))
3 #def apple(m,n):
4 #return dp, dp[m][n]
5 if m<n:
6 m,n=m,m
7 dp=[[] for i in range(m+1)]
8 for i in range(n+1):
9 dp[1].append(1)
10 dp[0].append(1)
11 for i in range(2,m+1):
12 dp[i].append(1)
13 dp[i].append(1)
14 for i in range(2,m+1):
15 for j in range(2,n+1):
16 #print(i,j,dp)
17 if i<j:
18 dp[i].append(dp[i][i])
19 else:
20 #print(i,j,dp[i][j-1]+dp[i-j][j])
21 dp[i].append(dp[i][j-1]+dp[i-j][j])
22 out=dp[m][n]
23 print(out)
