2011-12-27 15:02:12

地址：

题意：中文。刚开始没看懂，注意“总”字。

代码：

# include 
     
       long long dp[21][21] ; int main () {
   int i, j, m, n ; for (i = 0 ; i <= 20 ; i++)         dp[0][i] = 1 ; for (i = 1 ; i <= 20 ; i++) for (j = i ; j <= 20 ; j++)             dp[i][j] = dp[i-1][j] + dp[i][j-1] ; while (~scanf ("%d%d", &m, &n))         printf ("%I64d\n", dp[n][m]) ; return 0 ; }