#include using namespace std; using ll = long long; using pll = pair; #define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i) #define rep(i, n) drep(i, 0, n - 1) #define all(a) (a).begin(), (a).end() #define pb push_back #define fi first #define se second mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count()); const ll MOD1000000007 = 1000000007; const ll MOD998244353 = 998244353; const ll MOD[3] = {999727999, 1070777777, 1000000007}; const ll LINF = 1LL << 60; const int IINF = 1 << 30 - 1; template struct Edge{ int to; T w; Edge(int to_, T w_=1){ to = to_; w=w_; } }; template using Tree = vector>>; template using Graph = vector>>; /* 容量&重み付きエッジ for Dinic */ template struct REdge{ int to; T cap; T cost; int rev; REdge(int to_, T cap_, T cost_=1){ to = to_; cap = cap_; cost = cost_; } REdge(int to_, T cap_, T cost_, int rev_){ to = to_; cap = cap_; cost = cost_; rev = rev_; } }; /* 残余グラフ for Dinic */ template using RGraph = vector>>; const int MAX = 20000; short cnt[MAX][MAX]; int main(){ cin.tie(nullptr); ios::sync_with_stdio(false); short th = 300; //threshold short n; cin >> n; int m; cin >> m; vector p(n); for(short i=0; i> p[i]; Graph G(n); for(int i=0; i> u >> v; u--; v--; G[u].pb(Edge(v)); G[v].pb(Edge(u)); } Graph HD(n); for(short v=0; v e : G[v]) if((short)G[e.to].size()>th) HD[v].pb(Edge(e.to)); vector> mark_p(n); vector> inv(n); for(short v=0; v e : G[v]) cnt[v][p[e.to]]++; for(short v=0; v e : G[v]) mark_p[v].pb(p[e.to]); for(short v=0; v> q; while(q--){ int x, y; cin >> x >> y; x--; y--; //場所の更新を受け取る for(Edge e : HD[x]){ short i = inv[x][e.to]; cnt[x][mark_p[x][i]]--; cnt[x][p[e.to]]++; mark_p[x][i] = p[e.to]; } //判定Phase if(cnt[x][p[y]]==0 || p[x] == p[y]){ cout << "No" << '\n'; continue; } cout << "Yes" << '\n'; //xの場所の更新 if((short)G[x].size() <= th){ for(Edge e : G[x]){ short i = inv[e.to][x]; cnt[e.to][mark_p[e.to][i]]--; cnt[e.to][p[y]]++; mark_p[e.to][i] = p[y]; } } p[x] = p[y]; } }