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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Main
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		Scanner in = new Scanner(System.in);
  10.         int m = in.nextInt();
  11.         int n = in.nextInt();
  12.         long[][] a = new long[m][n];
  13.         a[m-1][0] = 1;
  14.         for(int i = m-1; i >= 0; i--) {
  15.             for(int j = 0; j < n; j++) {
  16.                 if(i == m-1 && j == 0) continue;
  17.                 a[i][j] = (i < m-1 ? a[i+1][j] : 0) + (j > 0 ? a[i][j-1] : 0);
  18.             }
  19.         }
  20.         System.out.print(a[0][n-1]);
  21. 	}
  22. }
Success #stdin #stdout 0.06s 2184192KB
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https://ideone.com/tXwAUK
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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