CF 9D. How many trees?(dp)

以前做过类似的，USACO，2.3，开始数组开小了，导致数据乱了，然后超数据范围了，。。

 1 #include <cstdio>
 2 #include <iostream>
 3 #include <cmath>
 4 using namespace std;
 5 #define LL __int64
 6 LL dp[101][101][101];
 7 LL c[71][71];
 8 int main()
 9 {
10     int i,j,n,k,u,h;
11     for(i = 0; i <= 70; i ++)
12     {
13         c[i][0] = 1;
14     }
15     for(i = 1; i <= 70; i ++)
16     {
17         for(j = 1; j <= 70; j ++)
18             c[i][j] = c[i-1][j-1] + c[i-1][j];
19     }
20     dp[1][1][1] = 1;
21     scanf("%d%d",&n,&h);
22     for(i = 1; i < n; i ++)
23     {
24         for(j = 1; j <= n; j ++)
25         {
26             for(k = 1; k <= n; k ++)
27             {
28                 if(dp[i][j][k] == 0) continue;
29                 for(u = 1; u <= 2*k; u ++)
30                     dp[i+1][j+u][u] += c[2*k][u]*dp[i][j][k];
31             }
32         }
33     }
34     LL ans = 0;
35     for(i = h; i <= n; i ++)
36     {
37         for(k = 1; k <= n; k ++)
38         {
39             ans += dp[i][n][k];
40         }
41     }
42     printf("%I64d
",ans);
43     return 0;
44 }