【唐赛】高一小学期2

纯唐比赛

\[不唐我都不带写的 \]

\[\LARGE 真正的唐赛,你值得一冲! \]

没啥看的

T1 同类分布

一眼数位DP,没啥好嗦的

但是,题面出锅,本来数据范围给的是 \(2^{31}\) ,结果考完一看测试数据 \(1 1000000000000000000\),照搬洛谷就算了吧,时限还抄错(洛谷3000ms 考试时1000ms) 我真的***** 你猜我为啥T1 90分

#include<bits/stdc++.h>
using namespace std;
#define rd read()
#define int long long
int read(){
	int f=1,x=0;
	char ch=getchar();
	for(;!isdigit(ch);ch=getchar()) if(ch=='-') f=-1;
	for(;isdigit(ch);ch=getchar()) x=x*10+ch-'0';
	return f*x;
} 
int l,r,f[20][200][200];
int len,a[20],mod;
int dfs(int pos,int sum,int num,int limit){
	if(pos==0) return sum==0?0:(sum==mod && num%mod==0);
	if(pos>len) return num==0 && sum==mod?1:0;
	if(!limit && f[pos][sum][num]!=-1) return f[pos][sum][num];

	int res=limit?a[len-pos+1]:9,ret=0;
	for(int i=0;i<=res && i+sum<=mod;i++)
		ret+=dfs(pos+1,sum+i,(10ll*num+i)%mod,i==res && limit);
		
	return limit?ret:f[pos][sum][num]=ret;
}
int part(int x){
	if(!x) return 0;
	len=0;
	while(x){
		a[++len]=x%10;
		x/=10;
	}
	int ret=0;
	for(mod=1;mod<=9*len;mod++){
		memset(f,-1,sizeof(f));
	    ret+=dfs(1,0,0,1);
	}
	return ret;
}
signed main(){
	#ifdef ONLINE_JUDGE
	freopen("a.in","r",stdin);
	freopen("a.out","w",stdout);
	#endif
	
    l=rd,r=rd;
    printf("%lld\n",part(r)-part(l-1));
	return 0;
}

T2 千山鸟飞绝

讨厌数据结构,所以直接去打暴力了

赛时暴力打锅了,没调出来

还有个原因,他TM T2 的题输入文件还是a.in a.out(T1 也是a.in a.out),由于惯性思维我TM一直以为是b.in b.out,直到刚不久别人告诉我我TM才发现

赛后暴力 70pts

#include<bits/stdc++.h>
using namespace std;
#define rd read()
#define int long long
#define mkp make_pair
int read(){
	int f=1,x=0;
	char ch=getchar();
	for(;!isdigit(ch);ch=getchar()) if(ch=='-') f=-1;
	for(;isdigit(ch);ch=getchar()) x=x*10+ch-'0';
	return f*x;
} 

const int N=300100;
struct Node{
    int x,y,z,u,v;
}bd[N];
struct Q{
    int v,x,y;
}q[N];
int n,T,cnt;
multiset<int>s1[N],s2[N];
int vis[N];
map< pair<int,int> ,int>mp;

void update(int x){
    multiset<int>::iterator it;
    it=s2[x].begin();
    int len=s1[x].size();
    if(len==1||len==0) return ;
    while(it!=s2[x].end()){
        s1[x].erase(bd[*it].z);
        bd[*it].u=max(bd[*it].u,len-1),bd[*it].v=max(bd[*it].v,(int)*(--s1[x].end()));
        s1[x].insert(bd[*it].z);
        it++;
    }
}

signed main(){
	#ifdef ONLINE_JUDGE
	freopen("a.in","r",stdin);
	freopen("a.out","w",stdout);
	#endif
	
    n=rd;
    for(int i=1;i<=n;i++){
        bd[i].z=rd,bd[i].x=rd,bd[i].y=rd;
        int t=mp[mkp(bd[i].x,bd[i].y)];
        if(!t){
            t=++cnt;
            mp[mkp(bd[i].x,bd[i].y)]=t;
        }
        s1[t].insert(bd[i].z),s2[t].insert(i);
    }
    
    for(int i=1;i<=n;i++){
        int t=mp[mkp(bd[i].x,bd[i].y)];
        s1[t].erase(bd[i].z);
        if(s1[t].empty()){
            s1[t].insert(bd[i].z);
            continue;
        }
        bd[i].u=s1[t].size();
        bd[i].v=*--s1[t].end();
        s1[t].insert(bd[i].z);
    }
    
    T=rd;
    
	for(int i=1;i<=T;i++)
		q[i].v=rd,q[i].x=rd,q[i].y=rd;
	
    for(int i=1;i<=T;i++){
		int v=q[i].v,x=q[i].x,y=q[i].y;
        int t=mp[mkp(bd[v].x,bd[v].y)];
        if(vis[t]){
            update(t);
            vis[t]=0;
        }
        
        s1[t].erase(bd[v].z),s2[t].erase(v);
        
        if(s1[t].empty())
            mp[mkp(bd[v].x,bd[v].y)]=0;
            
        t=mp[mkp(x,y)];
        bd[v].x=x,bd[v].y=y;
        
		if(s1[t].empty())t=0;
        
		if(t){
            bd[v].u=max(bd[v].u,(int)s1[t].size());
            bd[v].v=max(bd[v].v,(int)*--s1[t].end());
        }else{
            t=++cnt;
            mp[mkp(x,y)]=t;
        }
        s1[t].insert(bd[v].z);
        s2[t].insert(v);
        vis[t]=1;
    }
    
    for(int i=1;i<=n;i++){
        update(mp[mkp(bd[i].x,bd[i].y)]);
        printf("%lld\n",1ll*bd[i].u*bd[i].v);
    }
    
    return 0;
}

/*
5
1 1 1
3 1 2
4 4 4
2 0 1
2 2 3
5
1 1 2
2 4 4
2 4 3
3 0 1
5 0 1

*/

multiset是真的好用

\(\LARGE STL真香\)

贺题解,平衡树Splay

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define rd read()
#define inf 0x3f
#define INF 0x3f3f3f3f3f3f3f3f
#define mst(a,b) memset((a),(b),sizeof((a)))
#define mkp make_pair
#define Elaina 0
inline int read(){
    int x=0,f=1;
    char ch=getchar();
    for(;!isdigit(ch);ch=getchar()) if(ch=='-') f=-1;
    for(;isdigit(ch);ch=getchar()) x=x*10+ch-'0';
    return x*f;
}
const int N=3e5+100;

int w[N],num,a[N];
int lz1[N],lz2[N],ans1[N],ans2[N];
int q[N];
map< pair<int,int> ,int> vis;

struct Slpay{
	int rt,tot,fa[N],ch[N][2],val[N],rot[N],sz[N];
	
	int get(int x) {return x==ch[fa[x]][1];}
	
	void clear(int x) {ch[x][1]=ch[x][0]=sz[x]=fa[x]=val[x]=lz1[x]=lz2[x]=0;}
	
	void pushup(int x){
		sz[x]=sz[ch[x][1]]+sz[ch[x][0]]+1;
		val[x]=max(max(val[ch[x][1]],val[ch[x][0]]),w[x]);
	}
	
	void rotate(int x){
		int y=fa[x],z=fa[y],type=get(x);
		ch[y][type]=ch[x][type^1];
		fa[ch[x][type^1]]=y;
		ch[x][type^1]=y;
		fa[y]=x,fa[x]=z;
		if(z) ch[z][y==ch[z][1]]=x;
		pushup(y),pushup(x);
	}
	
	void pushdown(int x){
		int k1=lz1[x],k2=lz2[x];
		for(int i=0;i<=1;i++){
			if(ch[x][i]){
				int j=ch[x][i];
				ans1[j]=max(ans1[j],k1);
	            ans2[j]=max(ans2[j],k2);
	            lz1[j]=max(lz1[j],k1);
	            lz2[j]=max(lz2[j],k2);
			}
		}
		lz1[x]=lz2[x]=0;
	}
	
	void splay(int x,int &rt){
		int top=0;
		
		for(int f=x;f;f=fa[f]) q[++top]=f;
		
	    while(top) pushdown(q[top--]);
	    
		for(int f;f=fa[x];rotate(x)) 
			if(fa[f])
				rotate(get(f)==get(x)?f:x);
		rt=x;
	}
	
	int find_pre(int p){
		int now=ch[rot[p]][0];
	    while(ch[now][1]) now=ch[now][1];
	    return now;
	}
	
	void del(int p,int x){
		splay(x,rot[p]);
	    int now=rot[p];
	    if(!ch[now][0]&&!ch[now][1]){
	        clear(now);
	        rot[p]=0;
	        return;
	    }
	    for(int i=0;i<=1;i++){
	    	if(!ch[now][i]){
		        rot[p]=ch[now][i^1];
		        fa[rot[p]]=0;
		        clear(now);
		        return;
	    	}
	    }
	    x=find_pre(p);
	    splay(x,rot[p]);
	    fa[ch[now][1]]=x;
	    ch[x][1]=ch[now][1];
	    clear(now);
	    pushup(rot[p]);
	}
	
	void insert(int &p,int x,int f){
	    if(!p){
	        p=x,fa[p]=f,val[p]=w[p],sz[p]=1;
	        return;
	    }
	    pushdown(p);
	    if(!ch[p][0]) insert(ch[p][0],x,p);
	    else insert(ch[p][1],x,p);
	}
}tr;

signed main(){
	#ifdef ONLINE_JUDGE
	freopen("a.in","r",stdin);
	freopen("a.out","w",stdout);
	#endif
	
	int n=rd;
	for(int i=1;i<=n;i++){
		w[i]=rd;
		int x=rd,y=rd;
		if(!vis.count(mkp(x,y))) vis[mkp(x,y)]=++num;
        int k=vis[mkp(x,y)];
        a[i]=k;
        ans1[i]=max(ans1[i],tr.val[tr.rot[k]]);
        ans2[i]=max(ans2[i],tr.sz[tr.rot[k]]);
        tr.insert(tr.rot[k],i,0);
        tr.splay(i,tr.rot[k]);
        lz1[tr.rot[k]]=max(lz1[tr.rot[k]],w[i]);
        lz2[tr.rot[k]]=max(lz2[tr.rot[k]],tr.sz[tr.rot[k]]-1);
	}
	int t=read();
	while(t--){
		int i=rd,x=rd,y=rd;
		if(!vis.count(mkp(x,y))) vis[mkp(x,y)]=++num;
        int k=vis[mkp(x,y)],pre=a[i];
        a[i]=k;
        tr.del(pre,i);
        ans1[i]=max(ans1[i],tr.val[tr.rot[k]]);
        ans2[i]=max(ans2[i],tr.sz[tr.rot[k]]);
        tr.insert(tr.rot[k],i,0);
        tr.splay(i,tr.rot[k]);
        lz1[tr.rot[k]]=max(lz1[tr.rot[k]],w[i]);
        lz2[tr.rot[k]]=max(lz2[tr.rot[k]],tr.sz[tr.rot[k]]-1);
	}
	
	for(int i=1;i<=n;i++){
		tr.splay(i,tr.rot[a[i]]);
		printf("%lld\n",1ll*ans1[i]*ans2[i]);
	}
	return Elaina;
}

posted @ 2024-07-08 12:25  Elaina_0  阅读(44)  评论(3编辑  收藏  举报
浏览器标题切换
浏览器标题切换end