oj.uz

Submission #782205

# Submission time Handle Problem Language Result Execution time Memory
782205 2023-07-13T16:19:25 Z amirhoseinfar1385 Sumtree (INOI20_sumtree) C++17
10 / 100
 573 ms 268976 KB 
#include<bits/stdc++.h>
using namespace std;
long long n,k;
const long long maxn=2000000+10,maxm=5000000+10;
vector<long long>adj[maxn],child[maxn];
long long par[maxn],val[maxn],link[maxn],wa[maxn],cnt[maxn],asd,timea=0,high[maxn],fact[maxm],revfact[maxm],mod=1e9+7;
pair<long long,long long>stf[maxn];

long long kaf=(1<<19);

struct segment{
	set<pair<long long,long long>>seg[(1<<20)];
	pair<long long,long long> get(long long i){
		if(i==0){
			return make_pair(0,0);
		}
		if((long long)seg[i].size()==0){
			return get((i>>1));
		}
		auto x=*seg[i].rbegin();
		return max(get((i>>1)),x);
	}
	void del(long long i,long long l,long long r,long long tl,long long tr,long long w){
		if(l>r||l>tr||r<tl||tl>tr){
			return ;
		}
		if(l>=tl&&r<=tr){
			seg[i].erase(make_pair(high[w],w));
			return ;
		}
		long long m=(l+r)>>1;
		del((i<<1),l,m,tl,tr,w);
		del((i<<1)^1,m+1,r,tl,tr,w);
	}

	void upd(long long i,long long l,long long r,long long tl,long long tr,long long w){
		if(l>r||l>tr||r<tl||tl>tr){
			return ;
		}
		if(l>=tl&&r<=tr){
			seg[i].insert(make_pair(high[w],w));
			return ;
		}
		long long m=(l+r)>>1;
		upd((i<<1),l,m,tl,tr,w);
		upd((i<<1)^1,m+1,r,tl,tr,w);
	}
}segbal;

struct segjam{
	long long seg[(1<<20)];
	long long pors(long long i,long long l,long long r,long long tl,long long tr){
		if(l>r||l>tr||r<tl||tl>tr){
			return 0;
		}
		if(l>=tl&&r<=tr){
			return seg[i];
		}
		long long m=(l+r)>>1;
		long long ret=pors((i<<1),l,m,tl,tr)+pors((i<<1)^1,m+1,r,tl,tr);
		return ret;
	}
	void upd(long long i,long long w){
		if(i==0){
			return ;
		}
		seg[i]+=w;
		upd((i>>1),w);
	}
}segjam,segted;

struct segres{
	long long seg[(1<<20)];
	segres(){
		for(long long i=kaf;i<(1<<20);i++){
			seg[i]=-1;
		}
		for(long long i=1;i<kaf;i++){
			seg[i]=-1;
		}
	}
	void upd(long long i,long long w){
		if(i==0)
		{
			return ;
		}
		if(i>=kaf){
			seg[i]=w;
			return upd((i>>1),w);
		}
		////cout<<i<<" "<<w<<" "<<seg[(i<<1)]<<" "<<seg[(i<<1)^1]<<"\n";
		if((seg[(i<<1)])==-1&&seg[(i<<1)^1]==-1){
			seg[i]=-1;
			return upd((i>>1),w);
		}
		if((seg[(i<<1)])==-1){
			seg[i]=seg[(i<<1)^1];
			return upd((i>>1),w);
		}
		if(seg[(i<<1)^1]==-1){
			seg[i]=seg[(i<<1)];
			return upd((i>>1),w);
		}
		seg[i]=1ll*seg[(i<<1)]*seg[(i<<1)^1]%mod;
		return upd((i>>1),w);
	}

}res;

long long mypow(long long m,long long y){
	if(y==0){
		return 1;
	}
	long long p=mypow(m,(y>>1));
	p*=p;
	p%=mod;
	if(y&1){
		p*=m;
		p%=mod;
	}
	return p;
}

void aval(){	
	fact[0]=1;
	for(long long i=1;i<maxm;i++){
		fact[i]=1ll*fact[i-1]*i%mod;
	}
	revfact[maxm-1]=mypow(fact[maxm-1],mod-2);
	for(long long i=maxm-2;i>=0;i--){
		revfact[i]=1ll*revfact[i+1]*(i+1)%mod;
	}
}

long long c(long long i,long long j){
	//cout<<"av: "<<i<<" "<<j<<"\n";
	if(i<0||j<0||i<j){
		return 0;
	}
	//cout<<"dov: "<<i<<" "<<j<<"\n";
	long long ret=1ll*fact[i]*revfact[j]%mod*revfact[i-j]%mod;
	return ret;
}

void dfs(long long u,long long para=0){
	cnt[u]=1;
	high[u]=high[para]+1;
	timea++;
	stf[u].first=timea;
	par[u]=para;
	for(auto x:adj[u]){
		if(x!=para){
			child[u].push_back(x);
			dfs(x,u);
			cnt[u]+=cnt[x];
		}
	}
	stf[u].second=timea;
}

long long hes(long long a,long long b){
	a++;
	//cout<<"wtf: "<<a<<" "<<b<<"\n";
	long long ret=c(b+a-1,a-1);	
	return ret;
}

void tof(){
	//cout<<"salam"<<endl;
	res.upd(stf[1].first+kaf,hes(n-1,val[1]));
	//cout<<"vas "<<n-1<<" "<<val[1]<<" "<<hes(n-1,val[1])<<endl;
	segbal.upd(1,0,kaf-1,stf[1].first+1,stf[1].second,1);
	//cout<<"akh"<<endl;
	link[1]=0;
}

void upd(long long u,long long w){
	wa[u]=w;
	val[u]=w;
	long long pp=segbal.get(stf[u].first+kaf).second;
	long long jam=segjam.pors(1,0,kaf-1,stf[u].first+1,stf[u].second);
	long long ted=cnt[u]-segted.pors(1,0,kaf-1,stf[u].first+1,stf[u].second);
	//return ;
	segted.upd(kaf+stf[u].first,ted);
	segbal.upd(1,0,kaf-1,stf[u].first+1,stf[u].second,u);
	segjam.upd(kaf+stf[u].first,-jam+w);
	//return ;
	long long jamp=segjam.pors(1,0,kaf-1,stf[pp].first+1,stf[pp].second);
	long long tedp=cnt[pp]-segted.pors(1,0,kaf-1,stf[pp].first+1,stf[pp].second);
	long long fake=hes(tedp-1,val[pp]-jamp);
	//return ;
	//cout<<tedp<<" asd "<<val[pp]<<" "<<jamp<<" "<<ted<<" "<<fake<<"\n";
	res.upd(kaf+stf[pp].first,-1);
	return ;
	res.upd(kaf+stf[pp].first,fake);
	//return ;
	fake=hes(ted-1,val[u]-jam);
	//cout<<ted<<" sec "<<val[u]<<" "<<jam<<"\n";
	res.upd(stf[u].first+kaf,fake);
}

void del(long long u){
	long long pp=segbal.get(stf[u].first+kaf).second;
	long long jam=segjam.pors(1,0,kaf-1,stf[u].first+1,stf[u].second);
	long long ted=cnt[u]-segted.pors(1,0,kaf-1,stf[u].first+1,stf[u].second);
	segted.upd(kaf+stf[u].first,-ted);
	segbal.del(1,0,kaf-1,stf[u].first+1,stf[u].second,u);
	segjam.upd(kaf+stf[u].first,+jam-wa[u]);
	long long jamp=segjam.pors(1,0,kaf-1,stf[pp].first+1,stf[pp].second);
	long long tedp=cnt[pp]-segted.pors(1,0,kaf-1,stf[pp].first+1,stf[pp].second);
	long long fake=hes(tedp-1,val[pp]-jamp);
	res.upd(kaf+stf[pp].first,-1);
	res.upd(kaf+stf[pp].first,fake);
	res.upd(stf[u].first+kaf,-1);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	aval();
	cin>>n>>k;
	for(long long i=0;i<n-1;i++){
		long long u,v;
		cin>>u>>v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	dfs(1);
	segjam.upd(stf[1].first+kaf,k);
	////cout<<"salam"<<endl;
	val[1]=k;
	tof();
	//cout<<"salam"<<endl;
	long long q;
	cin>>q;
	asd=1;
	cout<<res.seg[1]<<"\n";
	for(;asd<=q;asd++){
		long long qq;
		cin>>qq;
		if(qq==1){
			long long u,w;
			cin>>u>>w;
			upd(u,w);
		}
		else{
			long long u;
			cin>>u;
			del(u);
		}
		cout<<res.seg[1]<<"\n";
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 257052 KB Output is correct
2 Correct 276 ms 257104 KB Output is correct
3 Correct 295 ms 257320 KB Output is correct
4 Correct 276 ms 257136 KB Output is correct
5 Correct 266 ms 254292 KB Output is correct
6 Correct 189 ms 230836 KB Output is correct
7 Correct 186 ms 230260 KB Output is correct
8 Correct 184 ms 230316 KB Output is correct
9 Correct 306 ms 249212 KB Output is correct
10 Correct 310 ms 249060 KB Output is correct
11 Correct 290 ms 249112 KB Output is correct
12 Correct 279 ms 248108 KB Output is correct
13 Correct 272 ms 255216 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 191 ms 230020 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 303 ms 268976 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 573 ms 259608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 257052 KB Output is correct
2 Correct 276 ms 257104 KB Output is correct
3 Correct 295 ms 257320 KB Output is correct
4 Correct 276 ms 257136 KB Output is correct
5 Correct 266 ms 254292 KB Output is correct
6 Correct 189 ms 230836 KB Output is correct
7 Correct 186 ms 230260 KB Output is correct
8 Correct 184 ms 230316 KB Output is correct
9 Correct 306 ms 249212 KB Output is correct
10 Correct 310 ms 249060 KB Output is correct
11 Correct 290 ms 249112 KB Output is correct
12 Correct 279 ms 248108 KB Output is correct
13 Correct 272 ms 255216 KB Output is correct
14 Incorrect 191 ms 230020 KB Output isn't correct
15 Halted 0 ms 0 KB -