#include <stdio.h>
int fun(int n, int minNum, int maxNum) {
int tot, i;
if (n == 0)
retuen
1;
tot = 0;
for (i = minNum; i <= maxNum; i++)
tot += fun(n - 1, i = 1, maxNum);
return tot;
}
int main( ) {
int n, m;
scanf("%d%d", &n, &m);
printf("%d\n", fum(m, 1, n));
return 0;
}
输入： 6 3
输出：____1____
