제출 #535071

#제출 시각아이디문제언어결과실행 시간메모리
535071new_acc다리 (APIO19_bridges)C++14
100 / 100
2029 ms9340 KiB
#include<bits/stdc++.h> #define fi first #define se second using namespace std; typedef long long ll; typedef vector<int> vi; typedef vector<ll> vl; const int N=1e5+10; struct st{ int a,b,c; }; int fau[N],siz[N],c[N],res[N]; pair<int,int>w[N]; bitset<N>pom; bitset<N>pom2; vi roolf; st zap[N]; int Find(int a){ while(fau[a]!=a) a=fau[a]; return a; } void Union(int a,int b,bool xd){ a=Find(a),b=Find(b); if(a==b) return; if(siz[a]>siz[b]) swap(a,b); fau[a]=b,siz[b]+=siz[a]; if(xd) roolf.push_back(a); } void rollback(){ while(roolf.size()){ int u=roolf.back(); roolf.pop_back(); siz[fau[u]]-=siz[u]; fau[u]=u; } } void solve(){ int n,m; cin>>n>>m; for(int i=1;i<=n;i++) fau[i]=i,siz[i]=1; for(int i=1;i<=m;i++) cin>>w[i].fi>>w[i].se>>c[i]; int q; cin>>q; for(int i=1;i<=q;i++) cin>>zap[i].a>>zap[i].b>>zap[i].c; int p=1000; for(int i=1;i<=q;i+=p){ vector<pair<int,int> >sorted; vector<pair<int,int> >aktz; for(int j=i;j<=min(q,i+p-1);j++){ if(zap[j].a==1) pom[zap[j].b]=1; else aktz.push_back({zap[j].c,j}); } for(int j=1;j<=m;j++){ if(pom[j]) continue; sorted.push_back({c[j],j}); } sort(sorted.begin(),sorted.end()); sort(aktz.begin(),aktz.end(),[](pair<int,int> a,pair<int,int> b){return a>b;}); int wsk=sorted.size()-1; for(auto u:aktz){ while(wsk>=0 and sorted[wsk].fi>=u.fi) Union(w[sorted[wsk].se].fi,w[sorted[wsk].se].se,0),wsk--; int ile=0; for(int j=u.se-1;j>=i;j--){ if(zap[j].a==2 or pom2[zap[j].b]) continue; pom2[zap[j].b]=1; if(zap[j].c>=u.fi) Union(w[zap[j].b].fi,w[zap[j].b].se,1); } for(int j=u.se+1;j<=min(q,i+p-1);j++){ if(zap[j].a==2 or pom2[zap[j].b]) continue; if(c[zap[j].b]>=u.fi) ile++,Union(w[zap[j].b].fi,w[zap[j].b].se,1); } res[u.se]=siz[Find(zap[u.se].b)]; rollback(); for(int j=u.se-1;j>=i;j--) pom2[zap[j].b]=0; } for(int j=1;j<=n;j++) fau[j]=j,siz[j]=1; roolf.clear(); for(int j=i;j<=min(q,i+p-1);j++){ if(zap[j].a==1) c[zap[j].b]=zap[j].c; pom[zap[j].b]=0; } } for(int i=1;i<=q;i++) if(zap[i].a==2) cout<<res[i]<<"\n"; } int main(){ ios_base::sync_with_stdio(0),cin.tie(0); solve(); }
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