BZOJ 3193 地形生成

这种dp好烦啊。

懒得写题解。

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#define maxn 1050
#define mod 2011
using namespace std;
int n,x,y,f[maxn],ans1=1,ans2=1,l[maxn],r[maxn],cnt=0;
struct status
{
    int h,f;
    friend bool operator < (const status &x,const status &y)
    {
        if (x.h!=y.h) return x.h>y.h;
        return x.f<y.f;
    }
}s[maxn];
int main()
{
    scanf("%d",&n);
    for (int i=1;i<=n;i++) scanf("%d%d",&s[i].h,&s[i].f);
    sort(s+1,s+n+1);
    for (int i=1;i<=n;i++)
    {
        if (s[i].h!=s[i-1].h)
        {
            r[cnt]=i-1;
            l[++cnt]=i;
        }
    }
    r[cnt]=n;
    for (int i=1;i<=cnt;i++)
    {
        for (int j=l[i];j<=r[i];j++) ans1=(ans1*min(s[j].f+j-l[i],j))%mod;
        memset(f,0,sizeof(f));f[1]=1;
        for (int j=l[i];j<=r[i];j++)
            for (int k=1;k<=min(s[j].f,l[i]);k++)
                    f[k]=(f[k]+f[k-1])%mod;
        int ret=0;for (int k=1;k<=min(s[r[i]].f,l[i]);k++) ret=(ret+f[k])%mod;
        ans2=(ans2*ret)%mod;
    }
    printf("%d %d\n",ans1,ans2);
    return 0;
}