oj.uz

답안 #883948

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
883948 2023-12-06T13:24:46 Z 8pete8 동기화 (JOI13_synchronization) C++17
30 / 100
 924 ms 60240 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric> //gcd(a,b)
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
using namespace std;
#define int long long
const int mod=1e9+7,mxn=2e5+5,lg=30,inf=1e18,minf=-1e18;
vector<pii>e,adj[mxn+10];
int hvy[mxn+10],pos[mxn+10],h[mxn+10],up[mxn+10][lg+10],sz[mxn+10],hvypa[mxn+10];
int last[mxn+10],mx[mxn+10],pa[mxn+10];
bitset<mxn+10>on;
int n;
void dfs(int cur,int p){
    for(auto i:adj[cur]){
        if(i.f==p)continue;
        h[i.f]=h[cur]+1;
        up[i.f][0]=cur;
        dfs(i.f,cur);
        sz[cur]+=sz[i.f];
    }
    sz[cur]++;
}
int cnt=1;
void hld(int cur,int p,int phvy){
    pos[cur]=cnt++;
    hvypa[cur]=phvy;
    for(auto i:adj[cur])if(i.f!=p&&sz[hvy[cur]]<sz[i.f])hvy[cur]=i.f;
    if(hvy[cur])hld(hvy[cur],cur,phvy);
    for(auto i:adj[cur])if(i.f!=p&&i.f!=hvy[cur])hld(i.f,cur,i.f);
}
struct seg{
    bool v[2*mxn+10];
    void init(){for(int i=0;i<=2*mxn+5;i++)v[i]=false;}
    void update(int pos,bool val){
        pos+=n+1;
        v[pos]=val;
        for(;pos>0;pos>>=1)v[pos>>1]=(v[pos]&v[pos^1]);
    }
    bool qry(int l,int r){
        bool ans=true;
        for(l+=n+1,r+=n+1;l<=r;l>>=1,r>>=1){
            if(l&1)ans&=(v[l++]);
            if(!(r&1))ans&=(v[r--]);
        }
        return ans;
    }
}t;
struct fen{
    int fwk[mxn+10];
    void init(){for(int i=0;i<=mxn+5;i++)fwk[i]=0;}
    void update(int pos,int val){for(int i=pos;i<=n;i+=(i&-i))fwk[i]+=val;}
    int qry(int pos){
        int sum=0;
        for(int i=pos;i>0;i-=(i&-i))sum+=fwk[i];
        return sum;
    }
}f;
void upd(int st,int above,int val){
    int cur=st;
    while(hvypa[cur]!=hvypa[above]){
        f.update(pos[cur]+1,-val);
        f.update(pos[hvypa[cur]],val);
        cur=up[hvypa[cur]][0];
    }
    f.update(pos[cur]+1,-val);
    f.update(pos[above],val);
}
int check(int st,int m){
    bool ans=true;
    int cur=st,above=st;
    for(int i=0;i<=lg;i++)if(m&(1<<i))above=up[above][i];
    while(hvypa[cur]!=hvypa[above]){
        ans&=t.qry(pos[hvypa[cur]],pos[cur]);
        cur=up[hvypa[cur]][0];
    }
    ans&=t.qry(pos[above],pos[cur]);
    if(ans)return above;
    return 0;
}
int findpa(int cur){
    int l=0,r=h[cur],ans=minf;
    while(l<=r){
        int mid=(l+r)/2;
        int g=check(cur,mid);
        if(g){
            l=mid+1;
            if(ans==minf||h[ans]>h[g])ans=g;
        }
        else r=mid-1;
    }
    return (ans==minf?cur:ans);
}
int cmx=minf;
void findans(int cur,int p){
    if(!on[cur])cmx=max(mx[cur],f.qry(pos[cur]));
    else cmx=max({cmx,mx[cur],f.qry(pos[cur])});
    mx[cur]=cmx;
    for(auto i:adj[cur])if(i.f!=p)findans(i.f,cur);
}
bitset<mxn+10>vis;
int find(int a){
    if(vis[a])return pa[a];
    vis[a]=true;
    if(on[a]){
        pa[a]=find(up[a][0]);
        mx[a]=max(mx[a],pa[a]);
        return pa[a];
    }
    return a;
}
int32_t main(){
	fastio
    int q,m;cin>>n>>q>>m;
    for(int i=1;i<=n-1;i++){
        int a,b;cin>>a>>b;
        e.pb({a,b});
        adj[a].pb({b,i});
        adj[b].pb({a,i});
    }
    dfs(1,-1);
    hld(1,-1,1);
    f.init();
    t.init();
    for(int i=1;i<=lg;i++)up[1][i]=1;
    for(int j=1;j<=lg;j++)for(int i=2;i<=n;i++)up[i][j]=up[up[i][j-1]][j-1];
    f.update(1,1);
    while(q--){
        int a;cin>>a;
        a--;
        if(h[e[a].f]<h[e[a].s])a=e[a].s;
        else a=e[a].f;
        if(on[a]){
            int node=up[findpa(a)][0];
            last[a]=f.qry(pos[a]);
            mx[node]=max(mx[node],f.qry(pos[node]));
            mx[a]=max(mx[a],mx[node]);
            t.update(pos[a],false);
        }
        else{
            t.update(pos[a],true);
            int node=up[findpa(a)][0];
            int tmp=f.qry(pos[a])-last[a];
            mx[node]=max(mx[node],f.qry(pos[node]));
            upd(up[a][0],node,tmp);
            mx[node]=max(mx[node],mx[node]+(tmp));
        }
        on[a]=!on[a];
    }
    findans(1,-1);
    for(int i=1;i<=m;i++){
        int a;cin>>a;
        cout<<mx[find(a)]<<'\n';
    }
	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10332 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 12380 KB Output is correct
4 Correct 3 ms 10332 KB Output is correct
5 Correct 3 ms 10332 KB Output is correct
6 Correct 3 ms 10588 KB Output is correct
7 Correct 15 ms 15852 KB Output is correct
8 Correct 14 ms 15828 KB Output is correct
9 Correct 14 ms 15804 KB Output is correct
10 Correct 200 ms 52932 KB Output is correct
11 Correct 186 ms 53436 KB Output is correct
12 Correct 831 ms 59328 KB Output is correct
13 Correct 92 ms 51568 KB Output is correct
14 Correct 156 ms 51644 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 223 ms 55488 KB Output is correct
2 Correct 222 ms 55228 KB Output is correct
3 Correct 255 ms 58824 KB Output is correct
4 Correct 264 ms 58556 KB Output is correct

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 12376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 924 ms 60240 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10328 KB Output is correct
2 Incorrect 3 ms 10332 KB Output isn't correct
3 Halted 0 ms 0 KB -