魔道研究

题目大意

有3*10^5个多重集合，许多次操作，每次操作往某个集合里插入一个数。对于所有i，把第i个集合里前i大的元素加入集合S中。每次操作后你需要输出集合S中前N大元素的和。

模拟

模拟题意，用数据结构维护即可。

这里使用spaly。

[code]#include<cstdio>
#include<algorithm>
#define fo(i,a,b) for(i=a;i<=b;i++)
using namespace std;
typedef long long ll;
const ll mo=1000000007;
ll flag[10][10]={
    {1 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 },
    {1 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 },
    {1 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 ,0 },
    {1 ,2 ,0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 },
    {1 ,2 ,0 ,0 ,1 ,0 ,0 ,0 ,0 ,0 },
    {1 ,1 ,1 ,0 ,0 ,1 ,0 ,0 ,0 ,0 },
    {1 ,0 ,2 ,0 ,0 ,0 ,1 ,0 ,0 ,0 },
    {1 ,3 ,0 ,2 ,1 ,0 ,0 ,1 ,0 ,0 },
    {1 ,2 ,1 ,1 ,0 ,2 ,0 ,0 ,1 ,0 },
    {1 ,4 ,0 ,4 ,2 ,0 ,0 ,4 ,0 ,1 }
},dt1[10]={12,9,6,6,6,3,0,3,0,0}
 ,dt2[10]={4 ,2,1,1,0,0,0,0,0,0};
ll c[30][30],f[250][250][20];
ll i,j,k,l,r,t,n,m,ans;
int main(){
    freopen("magic.in","r",stdin);freopen("magic.out","w",stdout);
    scanf("%lld%lld",&n,&m);
    f[0][0][0]=1;
    f[0][1][1]=4;f[0][1][2]=4;
    f[0][2][3]=4;f[0][2][4]=2;f[0][2][5]=8;f[0][2][6]=2;
    f[0][3][7]=4;f[0][3][8]=4;
    f[0][4][9]=1;
    c[0][0]=1;
    fo(i,1,14){
        c[i][0]=1;
        fo(j,1,i)
            c[i][j]=(c[i-1][j]+c[i-1][j-1])%mo;
    }
    fo(i,0,n-1)
        fo(j,0,m)
            fo(k,0,9)
                if (f[i][j][k])
                    fo(l,0,9)
                        if (flag[k][l])
                            fo(t,0,dt2[l])
                                if (j+t<=m)
                                    fo(r,0,dt1[l]-2*t)
                                        if (j+t+r<=m){
                                            f[i+1][j+t+r][l]+=f[i][j][k]*flag[k][l]*c[dt2[l]][t]*c[dt1[l]-2*t][r];
                                            f[i+1][j+t+r][l]%=mo;
                                        }
    fo(j,0,9) ans=(ans+f
[m][j])%mo;
    fo(i,1,m) ans=ans*i%mo;
    printf("%lld\n",ans);
    fclose(stdin);fclose(stdout);
    return 0;
}