Create 5729_dpppbr.cpp

From http://blog.csdn.net/dpppbr/article/details/51972196

HDOJ/5729_dpppbr.cpp

@@ -0,0 +1,47 @@
+//不初始化你给我死全家
+#include<iostream>
+#include<cstdio>
+#include<cmath>
+#include<cstring>
+#include<algorithm>
+#include<cstdlib>
+using namespace std;
+#define MS(x,y) memset(x,y,sizeof(x)) 
+#define MP(x,y) make_pair(x,y)
+#define lowbit(x) (x&(-x))
+typedef long long LL;
+inline void fre1(){freopen("input.txt","r",stdin);/*freopen("output.txt","w",stdout);*/}
+inline void fre2(){fclose(stdin);/*fclose(stdout);*/}
+const int MAXN=30+5;
+const double EPS=1e-8;
+const int MOD=1e9+7;
+LL fact[MAXN*MAXN],C[MAXN][MAXN],dp[MAXN][MAXN];
+
+int main()
+{
+	int n=11;
+	fact[0]=1;
+	for(int i=1;i<=n*n;++i) fact[i]=fact[i-1]*3%MOD;
+	C[0][0]=1;
+	for(int i=1;i<MAXN;++i){
+		C[i][0]=C[i][i]=1;
+		for(int j=1;j<i;++j)
+			C[i][j]=(C[i-1][j]+C[i-1][j-1])%MOD;
+	}
+	for(int i=1;i<=10;++i){
+		for(int j=0;j<=10;++j){
+			dp[i][j]=fact[i*j];
+			if(i==1&&j==0) dp[i][j]=1;
+			for(int ii=1;ii<=i;++ii){
+				for(int jj=0;jj<=j;++jj){
+					if(i==ii&&j==jj) continue;
+					dp[i][j]-=C[i-1][ii-1]*C[j][jj]%MOD*dp[ii][jj]%MOD*fact[(i-ii)*(j-jj)]%MOD;
+					dp[i][j]=(dp[i][j]%MOD+MOD)%MOD;
+				}
+			}
+		}
+	}
+	int m;
+	while(~scanf("%d%d",&n,&m)) printf("%I64d\n",dp[n][m]);
+	return 0;
+}