import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); int n=sc.nextInt(); int m=sc.nextInt(); int[][]a=new int[n+1][m+1]; for (int i = 1; i <=n; i++) { for (int j = 1; j <=m; j++) { if(i==1||j==1) a[i][j]=1; else if(i%2==0&&j%2==0) a[i][j]=0; else a[i][j]=a[i-1][j]+a[i][j-1]; } } System.out.println(a[n][m]); } }
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