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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#546847#2214. Link Cut DigraphwrkwrkAC ✓1379ms306572kbC++209.6kb2024-09-04 14:38:302024-09-04 14:38:30

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你现在查看的是最新测评结果

  • [2024-09-04 14:38:30]
  • 评测
  • 测评结果:AC
  • 用时:1379ms
  • 内存:306572kb
  • [2024-09-04 14:38:30]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
bool st;
namespace _wrk{;
template<int mod>
struct modint{
	int num;
	const static __uint128_t brt=((__uint128_t)(1)<<(64))/mod;
	modint(){
		num=0;
	}
	modint(int x){
		num=x%mod;
	}
	modint(long long x){
		num=x%mod;
	}
	modint<mod>operator=(int x){
		num=x%mod;
		return (*this);
	}
	modint<mod>operator=(long long x){
		num=x%mod;
		return (*this);
	}
	modint<mod>operator=(modint<mod>x){
		num=x.num;
		return (*this);
	}
	modint<mod> operator+(modint<mod> c)const{
		long long x=num+c.num;
		return x>=mod?x-mod:x;
	}
	modint<mod> operator-(modint<mod> c)const{
		long long x=num-c.num;
		return x<0?x+mod:x;
	}
	modint<mod>operator*(modint<mod>c)const{
		long long x=(long long)num*c.num;
		x=x-mod*(brt*x>>64);
		while(x>=mod)x-=mod;
		return x;
	}
	modint<mod>fpof(int x)const{
		if(x<0)return inv().fpof(-x);
		if(x==0)return 1;
		auto c=((*this)*(*this)).fpof(x/2);
		if(x&1)return c*(*this);
		else return c;
	}
	struct modint_pow{
		int pf;
		modint_pow(int x){
			pf=x;
		}
		modint_pow(modint<mod> x){
			pf=x.num;
		}
		modint_pow operator+(modint_pow x){
			return pf+x.pf;
		}
	};
	modint_pow operator*(){
		return modint_pow(num);
	}
	modint<mod> operator*(modint_pow x){
		return (*this).fpof(x.pf);
	}
	modint<mod>inv()const{
		return fpof(mod-2);
	}
	modint<mod>operator/(modint<mod>c){
		return (*this)*c.inv();
	}
	operator int(){
		return num;
	}

	modint<mod>operator+=(modint<mod> c){
		return (*this)=(*this)+c;
	}
	modint<mod>operator-=(modint<mod> c){
		return (*this)=(*this)-c;
	}
	modint<mod>operator*=(modint<mod> c){
		return (*this)=(*this)*c;
	}
	modint<mod>operator/=(modint<mod> c){
		return (*this)=(*this)/c;
	}
	modint<mod>operator-(){
		return mod-num;
	}
	friend ostream& operator<<(ostream &w,modint<mod>&&x){
		w<<x.num;
		return w;
	}
	friend istream& operator>>(istream &w,modint<mod>&x){
		w>>x.num;
		x.num%=mod;
		return w;

	}
	bool operator==(modint<mod>x){
		return num==x.num;
	}

};

template<int mod,class type>
modint<mod>operator+(type a,modint<mod>b){
	return modint<mod>(a)+b;
}
template<int mod,class type>
modint<mod>operator-(type a,modint<mod>b){
	return modint<mod>(a)-b;
}
template<int mod,class type>
modint<mod>operator*(type a,modint<mod>b){
	return modint<mod>(a)*b;
}
template<int mod,class type>
modint<mod>operator/(type a,modint<mod>b){
	return modint<mod>(a)/b;
}
#define int long long

template<class type,int N>
struct matrix{
	type a[N+2][N+2];
	int n;
	type* operator[](int pos){
		return a[pos];
	}
	matrix<type,N> operator*(matrix<type,N>b){
		matrix<type,N>ans;
		ans.n=n;
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
				for(int k=1;k<=n;k++){
					ans[i][j]+=a[i][k]*b[k][j];
				}
			}
		}
		return ans;
	}
};
template<class type>
type fp(type a,int b){
	if(b==0)return type();
	if(b==1)return a;
	type w=fp(a*a,b/2);
	if(b%2)return w*a;
	return w;
}
template<class type,int N>
struct backup_array{
	type name[N+5];
	vector<vector<pair<int,int>>>cc;
	void new_array(){
		cc.push_back(vector<pair<int,int>>());
	}
	backup_array(){
		cc.resize(1);
	}
	struct x{
		int id;
		type* name;
		vector<vector<pair<int,int>>> &cc;
		operator type(){
			return name[id];
		}
		type operator=(type w){
			cc.back().push_back({id,name[id]});
			name[id]=w;
			return w;
		}
	};
	x operator[](int pos){
		return {pos,name,cc};
	}
	void backup(){
		reverse(cc.back().begin(),cc.back().end());
		for(auto &x:cc.back()){
			name[x.first]=x.second;
		}
		cc.pop_back();
	}
};
template<class type,int N>
struct Math{
	type jc[N+5],inv[N+5],invjc[N+5];
	Math(){
		jc[0]=jc[1]=inv[1]=invjc[1]=invjc[0]=1;
		for(int i=2;i<=N;i++){
			jc[i]=jc[i-1]*type(i);
		}
		invjc[N]=type(1)/jc[N];
		for(int i=N-1;i>=2;i--){
			invjc[i]=invjc[i+1]*type(i+1);
		}
		for(int i=1;i<=N;i++){
			inv[i]=invjc[i]*jc[i-1];
		}
	}
	type binom(int a,int b){
		return jc[a]*invjc[b]*invjc[a-b];
	}
	type catalan(int n){
		return binom(2*n,n)/type(n+1);
	}
};
#ifdef use_seg_tree
template<class type,class laz_type,int len>
struct segment_tree{
	type a[len<<2];
	laz_type laz[len<<2];
	void pushup(int now){
		PUSHUP_VALUE
	}
	void pushdown(int now,int l,int r){
		PUSHDOWN_VALUE
	}
	void build(int now,int l,int r){
		if(l+1==r){
			FIRST_VALUE
			return;
		}
		LAZ_CLEAR
		int mid=(l+r)>>1;
		build(now<<1,l,mid);
		build(now<<1|1,mid,r);
		pushup(now);
	}
	void do1(int now,int l,int r,int L,int R,...){
		if(l+1!=r)pushdown(now,l,r);
		if(R<=l||r<=L)return;
		if(L<=l&&r<=R){
			FULL_BLOCK_VALUE
			return;
		}
		int mid=(l+r)>>1;
		do1(now<<1,l,mid,L,R,...);
		do1(now<<1|1,mid,r,L,R,...);
		pushup(now);
	}
	void do1_one(int now,int l,int r,int p,...){
		if(l+1!=r)pushdown(now,l,r);
		if(l+1==r){
			DO1_VALUE
			return;
		}
		int mid=(l+r)>>1;
		if(p<mid)do1_one(now<<1,l,mid,p,...);
		else do1_one(now<<1|1,mid,r,p,...);
		pushup(now);
	}
	type qu1(int now,int l,int r,int L,int R){
		if(l+1!=r)pushdown(now,l,r);
		if(R<=l||r<=L)return BASE_VALUE
		if(L<=l&&r<=R)return a[now];
		int mid=(l+r)>>1;
		return RETURN_VALVE qu1(now<<1,l,mid,L,R)+qu1(now<<1|1,mid,r,L,R);
	}
	type qu1_one(int now,int l,int r,int p){
		if(l+1!=r)pushdown(now,l,r);
		if(l+1==r)return a[now];
		int mid=(l+r)>>1;
		if(p<mid)return qu1_one(now<<1,l,mid,p);
		else return qu1_one(now<<1|1,mid,r,p);

	}
};
#endif
//#define mod 998244353
//#define mint modint<mod>
//Math<mint,1000006>math;
set<pair<int,int>>gg[21][100005],*g;
//#define g gg[0]
vector<int>wp[100005];
int cnt=1,beinbl;
int block[100005],f1[100005],f2[100005];
bool insta[100005];
int ans[300005];
int low[100005],dfsid[100005];
int sss[100005];
int isf[300005];
int ww=0;
int fin1(int now){
	return f1[now]==now?now:f1[now]=fin1(f1[now]);
}
int fin2(int now){
	return f2[now]==now?now:f2[now]=fin2(f2[now]);
}
stack<int>sta;
int st,en;
vector<int>ids;
void dfs(int now){
	sta.push(now);
	insta[now]=1;
	low[now]=dfsid[now]=cnt++;
	auto z=g[now].begin();
	vector<set<pair<int,int>>::iterator>w;
	while(z!=g[now].end()&&(*z).first<en){
		auto &edge=*z;
		int to=fin2(edge.second);
		if(block[fin2(now)]==block[fin2(to)]&&fin2(now)!=fin2(to)){
			ww++;
			if(!dfsid[to]){
				dfs(to);
				low[now]=min(low[now],low[to]);
			}else if(insta[to]){
				low[now]=min(low[now],dfsid[to]);
			}
		}
		if(fin2(now)==fin2(to)){
			w.push_back(z);
		}
		z++;
	}
	for(auto x:w){
		g[now].erase(x);
	}
	if(low[now]==dfsid[now]){
		while(sta.top()!=now){
			f1[fin1(sta.top())]=fin1(now);
			insta[sta.top()]=0;
			sta.pop();
		}
		sta.pop();
		insta[now]=0;
	}
}
void solve(int l,int r,vector<int>&nc,int dep=0){
	ww=0;
	g=gg[dep];
//	cerr<<l<<' '<<r<<' '<<dep<<endl;
//	for(auto p:nc){
//		cout<<fin2(p)<<' '<<sss[fin2(p)]<<endl;;
//		for(auto x:g[fin2(p)]){
//			cout<<' '<<x.first<<'-'<<fin2(p)<<','<<x.second<<endl;
//		}
//	}
//	cout<<endl;
	if(l>=r)return ;
	int mid=(l+r)>>1;
	en=mid+1;
	for(auto &x:nc){
		x=fin2(x);
		f1[fin2(x)]=fin2(x);
		dfsid[fin2(x)]=0;
	}
	for(auto x:nc){
		if(!dfsid[fin2(x)]){
			dfs(fin2(x));
//			cout<<mid<<' '<<fin2(x)<<' '<<g[fin2(x)].size()<<endl;
		}
	}
	for(auto x:nc){
		wp[fin2(x)].clear();
	}
	for(auto x:nc){
		if(g[fin2(x)].size())wp[fin1(fin2(x))].push_back(fin2(x));
	}
	vector<int>bac,cc;
	vector<vector<int>>zz;
	vector<int>p;
	for(auto x:nc){
		if(wp[fin2(x)].size()){
			bac.push_back(fin2(x));
			zz.push_back(wp[fin2(x)]);
			int a=0,b=0;
			for(auto w:wp[fin2(x)]){
				a+=sss[w];
				b+=sss[w]*sss[w];
			}
			ans[mid]+=(a*a-b)/2;
			p.push_back(a);
			beinbl++;
			for(auto y:wp[x]){
				block[y]=beinbl;
			}
			for(auto y:wp[x]){
				for(auto w:g[y]){
					ww++;
					if(w.first<mid&&block[fin2(y)]==block[fin2(w.second)]){
						gg[dep+1][fin2(y)].insert({w.first,fin2(w.second)});
					}
					
				}
			}
			wp[fin2(x)].clear();
		}
	}
	int wwp=ww;
	solve(l,mid,nc,dep+1);
	ww=wwp;
	g=gg[dep];
	for(auto w:nc){
		gg[dep+1][fin2(w)].clear();
	}
	for(auto y:zz){
		beinbl++;
		for(auto z:y){
			block[z]=beinbl;
		}
	}
	beinbl++;
//	cout<<mid<<endl;
	for(int i=0;i<bac.size();i++){
		int x=bac[i];
		vector<int>y=zz[i];
		sss[fin2(x)]=p[i];
//		cout<<mid<<' '<<x<<' '<<p[i]<<endl;
		for(auto w:y){
			for(auto xx:g[w]){
//	cout<<fin2(x)<<' '<<fin2(xx.second)<<' '<<block[fin2(x)]<<' '<<block[fin2(xx.second)]<<endl;
//				ww++;
				if(block[fin2(x)]!=block[fin2(xx.second)]){
					gg[dep+1][fin2(x)].insert({xx.first,fin2(xx.second)});
//					cout<<mid<<','<<fin2(x)<<' '<<fin2(xx.second)<<endl;
				}
			}
		}
		for(auto w:y){
			ww++;
			f2[fin2(w)]=fin2(x);
		}
		
		
		block[fin2(x)]=beinbl;
	}
//	cerr<<ww<<endl;
	solve(mid+1 ,r,bac,dep+1);
	g=gg[dep];
	for(auto &x:bac){
		gg[dep+1][x].clear(); 
	}
}
void pre(int l,int r){
	if(l>=r)return;
	int mid=(l+r)>>1;
	isf[mid]=l-1;
	pre(l,mid);
	pre(mid+1,r);
}
signed main(){
//	freopen("graph.in","r",stdin);
//	freopen("graph.out","w",stdout);
	ios::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	int n,m;
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		int a,b;
		cin>>a>>b;
		gg[0][a].insert({i,b});
	}
	vector<int>w;
	for(int i=1;i<=n;i++){
		f1[i]=f2[i]=i;
		sss[i]=1;
		w.push_back(i);
	}
	pre(1,m+1);
	solve(1,m+1,w);
	for(int i=1;i<=m;i++){
		ans[i]+=ans[isf[i]];
		cout<<ans[i]<<'\n'; 
	} 
	return 0;
}
}
bool en;
signed main(){
	#ifdef LOCAL_WRK
	cerr<<"[Static Memory : "<<fixed<<((&st)-(&en))/1048576.0<<"MB]"<<endl;
	#endif
	   return _wrk::main();
}





Details

Test #1:

score: 100
Accepted
time: 1355ms
memory: 285332kb

Test #2:

score: 0
Accepted
time: 1310ms
memory: 286268kb

Test #3:

score: 0
Accepted
time: 1297ms
memory: 285608kb

Test #4:

score: 0
Accepted
time: 1141ms
memory: 298876kb

Test #5:

score: 0
Accepted
time: 1301ms
memory: 283376kb

Test #6:

score: 0
Accepted
time: 1321ms
memory: 286208kb

Test #7:

score: 0
Accepted
time: 1307ms
memory: 284836kb

Test #8:

score: 0
Accepted
time: 1351ms
memory: 290352kb

Test #9:

score: 0
Accepted
time: 988ms
memory: 306572kb

Test #10:

score: 0
Accepted
time: 1312ms
memory: 287944kb

Test #11:

score: 0
Accepted
time: 1372ms
memory: 285140kb

Test #12:

score: 0
Accepted
time: 1379ms
memory: 286728kb

Test #13:

score: 0
Accepted
time: 1041ms
memory: 305840kb

Test #14:

score: 0
Accepted
time: 1027ms
memory: 305804kb

Test #15:

score: 0
Accepted
time: 455ms
memory: 176288kb

Test #16:

score: 0
Accepted
time: 1201ms
memory: 241800kb

Test #17:

score: 0
Accepted
time: 1168ms
memory: 240856kb

Test #18:

score: 0
Accepted
time: 1170ms
memory: 238212kb

Test #19:

score: 0
Accepted
time: 1378ms
memory: 286236kb

Test #20:

score: 0
Accepted
time: 1199ms
memory: 291088kb

Test #21:

score: 0
Accepted
time: 1165ms
memory: 291068kb

Test #22:

score: 0
Accepted
time: 1173ms
memory: 290592kb

Test #23:

score: 0
Accepted
time: 1162ms
memory: 291396kb

Test #24:

score: 0
Accepted
time: 1125ms
memory: 291088kb

Test #25:

score: 0
Accepted
time: 1107ms
memory: 289656kb

Test #26:

score: 0
Accepted
time: 1122ms
memory: 287624kb

Test #27:

score: 0
Accepted
time: 1134ms
memory: 283820kb