#pragma GCC optimize("O3") #include using namespace std; using ll=long long; using P=pair; template using V=vector; #define fi first #define se second #define all(v) (v).begin(),(v).end() const ll inf=(1e18); //const ll mod=998244353; const ll mod=1000000007; const vector dy={-1,0,1,0},dx={0,-1,0,1}; ll GCD(ll a,ll b) {return b ? GCD(b,a%b):a;} ll LCM(ll c,ll d){return c/GCD(c,d)*d;} struct __INIT{__INIT(){cin.tie(0);ios::sync_with_stdio(false);cout< bool chmax(T &a, const T &b) { if (a bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; } templatevoid debag(const vector &a){cerr<<"debag :";for(auto v:a)cerr<void print(const vector &a){for(auto v:a)cout<>=1ll; } return res; } mint inv()const{return pow(mod-2);} //拡張ユークリッドの互除法 /* mint inv()const{ int x,y; int g=extgcd(v,mod,x,y); assert(g==1); if(x<0)x+=mod; return mint(x); }*/ friend ostream& operator<<(ostream&os,const mint&val){ return os<(const mint&val)const{return v>val.v;} }; class UF{ public: vector par,num; int find(int v){ return (par[v]==v)? v: (par[v]=find(par[v])); } explicit UF(){} explicit UF(int N):par(N),num(N,1){ iota(all(par),0); } void init(int N){ par.assign(N,0); num.assign(N,1); iota(all(par),0); } void unite(int u,int v){ u=find(u),v=find(v); if(u==v)return; if(num[u]>n>>m; UF uf(n); V cnt(n,0); V a(m),b(m); V> g(n); for(int i=0;i>a[i]>>b[i]; --a[i];--b[i]; if(uf.same(a[i],b[i]))continue; if(uf.size(a[i])==uf.size(b[i])){ while(g[uf.find(b[i])].size()){ g[uf.find(a[i])].emplace_back(g[uf.find(b[i])].back()); g[uf.find(b[i])].pop_back(); } for(int v:g[uf.find(a[i])])cnt[v]++; uf.unite(a[i],b[i]); }else{ if(uf.size(a[i])