华为笔试题第二题总是提示通过0%
dota那道题，总是提示0%。求大佬看看问题出在哪里
import java.util.Arrays;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt(), m = in.nextInt();
long[] dp = new long[m + 1];
Arrays.fill(dp, 1);
dp[m] = 1;
for (int i = n - 1; i > 0; i--) {
for (int j = m - 1; j >= 0; j--) {
dp[j] += dp[j + 1];
dp[j] %= 1000000007;
}
}
System.out.println(dp[0]==Integer.MAX_VALUE?-1:dp[0]);
}
} 
