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Submission #782249

# Submission time Handle Problem Language Result Execution time Memory
782249 2023-07-13T16:40:05 Z amirhoseinfar1385 Sumtree (INOI20_sumtree) C++17
10 / 100
 606 ms 269004 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 sega[(1<<20)];
	segres(){
		for(long long i=kaf;i<(1<<20);i++){
			sega[i]=-1;
		}
		for(long long i=1;i<kaf;i++){
			sega[i]=-1;
		}
	}
	void upd(long long i,long long w){
		if(i==0)
		{
			return ;
		}
		//return ;
		if(i<0||i>=(1<<20)){
			return ;
		}
		if((i<<1)>=(1<<20)){
			//return ;
			sega[i]=w;
			//return ;
			return upd((i>>1),w);
		}
	//	return ;
		////cout<<i<<" "<<w<<" "<<seg[(i<<1)]<<" "<<seg[(i<<1)^1]<<"\n";
		if((sega[(i<<1)])==-1&&sega[(i<<1)^1]==-1){
			sega[i]=-1;
			return upd((i>>1),w);
		}
		//return ;
		if((sega[(i<<1)])==-1){
			sega[i]=sega[(i<<1)^1];
			return upd((i>>1),w);
		}
		if(sega[(i<<1)^1]==-1){
			sega[i]=sega[(i<<1)];
			return upd((i>>1),w);
		}
		sega[i]=1ll*sega[(i<<1)]*sega[(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 ;
//	if(kaf+stf[pp].first>=(1<<20)){
//		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.sega[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.sega[1]<<"\n";
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 285 ms 257140 KB Output is correct
2 Correct 283 ms 257060 KB Output is correct
3 Correct 293 ms 257076 KB Output is correct
4 Correct 279 ms 257132 KB Output is correct
5 Correct 269 ms 254348 KB Output is correct
6 Correct 186 ms 230560 KB Output is correct
7 Correct 184 ms 230316 KB Output is correct
8 Correct 183 ms 230316 KB Output is correct
9 Correct 286 ms 249076 KB Output is correct
10 Correct 303 ms 248980 KB Output is correct
11 Correct 312 ms 249056 KB Output is correct
12 Correct 307 ms 248092 KB Output is correct
13 Correct 270 ms 255300 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 266 ms 230120 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 326 ms 269004 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 606 ms 259732 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 285 ms 257140 KB Output is correct
2 Correct 283 ms 257060 KB Output is correct
3 Correct 293 ms 257076 KB Output is correct
4 Correct 279 ms 257132 KB Output is correct
5 Correct 269 ms 254348 KB Output is correct
6 Correct 186 ms 230560 KB Output is correct
7 Correct 184 ms 230316 KB Output is correct
8 Correct 183 ms 230316 KB Output is correct
9 Correct 286 ms 249076 KB Output is correct
10 Correct 303 ms 248980 KB Output is correct
11 Correct 312 ms 249056 KB Output is correct
12 Correct 307 ms 248092 KB Output is correct
13 Correct 270 ms 255300 KB Output is correct
14 Incorrect 266 ms 230120 KB Output isn't correct
15 Halted 0 ms 0 KB -