Submission #1077650

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077650		BABY_GANGSTER	Jail (JOI22_jail)	C++17	60 / 100	5124 ms	839504 KiB

jail

#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
//#define int long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
void phongbeo();
const int inf=1e9;
const int mod2=1e9+7;
const int  mod1=998244353;
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a,b,c;
};
struct id
{
    int a,b,c,d;
};
struct ie
{
    int a,b,c,d,e;

};

int n,m,s1,s2,s4,s3,sf,k,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,s33,dem3,dem4,l,r,mid;
int  i,s10,s12;
int kk;
int el=29;
#define getchar_unlocked getchar

inline int scan(){
    char c = getchar_unlocked();
    int x = 0;
    while(c<'0'||c>'9'){
        c=getchar_unlocked();
    }
    while(c>='0'&&c<='9'){
        x=(x<<1)+(x<<3)+c-'0';
        c=getchar_unlocked();
    }
    return x;
}
main()
{
#ifndef ONLINE_JUDGE
//fin(task),fou(task);
#endif
    NHP
    /// cin>>s1;
   int xx=scan();
  //  modwwe
  while(xx--)
    phongbeo(),down
//checktime
}
const int N=1e5+2e4+1;
int depth[N];
int head[N];
int pos[N];
int tout[N];
vector<int> v2[N];
vector<ib> v[N*4][2];
int heavy[N];
ib a[N];
int f[N];
int sz[N];
int mxz[N];
int c[N*4][2];
int par[N];
void dfs(int x,int y)
{
    sz[x]=1;
    mxz[x]=0;
    par[x]=y;
    depth[x]=depth[y]+1;
    for(auto f:v2[x])
    {
        if(f!=y)
        {
            dfs(f,x);
            sz[x]+=sz[f];
            if(sz[f]>sz[x])
                heavy[x]=f,mxz[x]=sz[f];
        }
    }
}

void des(int x,int y)
{
    head[x]=y;
    pos[x]=++dem;
    if(heavy[x]!=0)
        des(heavy[x],y);
    for(auto f:v2[x])
        if(pos[f]==0)
            des(f,f);
            tout[x]=dem;
}
struct IT
{
    void setup(int node,int l,int r)
    {
  //  cout<<node<<" "<<l<<" "<<r,debug
            if(node!=1)v[node>>1][0].pb({node,0});
        if(node!=1) v[node][1].pb({node>>1,1});
        if(l==r)
        {
            f[l]=node;
            return;
        }
        int mid=l+r>>1;
        setup(node<<1,l,mid);
        setup(node<<1|1,mid+1,r);
    }
      void upd(int node,int l,int r,int l1,int r1,int x)
    {
        if(l>=l1&&r<=r1)
        {
            v[x][0].pb({node,0});
          //  cout<<x<<" "<<node<<" "<<0,down
         //   if(x==5) cout<<node,debug
            return;
        }
        int mid=l+r>>1;
        if(l1<=mid)upd(node<<1,l,mid,l1,r1,x);
        if(r1>=mid+1) upd(node<<1|1,mid+1,r,l1,r1,x);

    }
    void upd2(int node,int l,int r,int l1,int r1,int x)
 {
        if(l>=l1&&r<=r1)
        {
            v[node][1].pb({x,0});
            return;
        }
        int mid=l+r>>1;
        if(l1<=mid)upd2(node<<1,l,mid,l1,r1,x);
        if(r1>=mid+1)upd2(node<<1|1,mid+1,r,l1,r1,x);
 }
    void upd_hld(int u, int v, int i,int dd){
   while (head[u]!=head[v]){
      if (depth[head[u]]<depth[head[v]]) swap(u, v);
      upd(1, 1, n, pos[head[u]], pos[u], i);
      u=par[head[u]];
   }
   if (depth[u]>depth[v]) swap(u, v);
   upd(1, 1, n, pos[u]+dd, pos[v], i);
}
void upd_hld2(int u, int v, int i,int dd){
   while (head[u]!=head[v]){
      if (depth[head[u]]<depth[head[v]]) swap(u, v);
      upd2(1, 1, n, pos[head[u]], pos[u], i);
      u=par[head[u]];
   }
   if (depth[u]>depth[v]) swap(u, v);
   if(pos[u]+dd<=pos[v])
   upd2(1, 1, n, pos[u]+dd, pos[v], i);
}
} stt;
bool de;
bool check(int x,int y)
{
     if(pos[x]<=pos[y]&&tout[x]>=pos[y]) return 1;
      return 0;
}
void dfs2(int x,int y)
{
     c[x][y]=1;
     for(auto f:v[x][y]){
     if(f.b==0&&c[f.a][0]==1){de=1; return;}
      if(c[f.a][f.b]) continue;
      dfs2(f.a,f.b);
      if(de)return;
     }
     c[x][y]=2;
}

void phongbeo()
{
n=scan();
    /// cach 1
    de=0;
    dem=0;
    for(int i=1; i<=n; i++)
        v2[i].clear(),f[i]=0,heavy[i]=0,pos[i]=0,head[i]=0,depth[i]=0;
    for(int i=1; i<=n*4; i++)
        v[i][0].clear(),v[i][1].clear(),c[i][0]=c[i][1]=0;
    for(int i=1; i<n; i++)
       l=scan(),r=scan(),v2[l].pb(r),v2[r].pb(l);
    dfs(1,0);
    des(1,0);
    stt.setup(1,1,n);
m=scan();
    for(int i=1; i<=m; i++){
       a[i].a=scan(),a[i].b=scan();
       v[f[pos[a[i].a]]][0].pb({f[pos[a[i].b]],1});
       if(check(a[i].a,a[i].b)){
   stt.upd_hld(a[i].a,par[a[i].b],f[pos[a[i].a]],1);}
   else if(check(a[i].b,a[i].a)){
        stt.upd_hld(par[a[i].a],a[i].b,f[pos[a[i].a]],1);}
   else {
        stt.upd_hld(par[a[i].a],par[a[i].b],f[pos[a[i].a]],0);}
    if(check(a[i].b,a[i].a))
        stt.upd_hld2(a[i].a,a[i].b,f[pos[a[i].a]],1);
    else stt.upd_hld2(a[i].a,par[a[i].b],f[pos[a[i].a]],0);
       }
    for(int i=1; i<=m; i++)
    {

        if(!c[f[pos[a[i].a]]][0]) dfs2(f[pos[a[i].a]],0);
        if(de)break;
    }


    if(de) cout<<"No";
    else cout<<"Yes";
}

Compilation message (stderr)

jail.cpp:63:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   63 | main()
      | ^~~~
jail.cpp: In function 'void des(int, int)':
jail.cpp:115:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  115 |         if(pos[f]==0)
      |         ^~
jail.cpp:117:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  117 |             tout[x]=dem;
      |             ^~~~
jail.cpp: In member function 'void IT::setup(int, int, int)':
jail.cpp:131:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  131 |         int mid=l+r>>1;
      |                 ~^~
jail.cpp: In member function 'void IT::upd(int, int, int, int, int, int)':
jail.cpp:144:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  144 |         int mid=l+r>>1;
      |                 ~^~
jail.cpp: In member function 'void IT::upd2(int, int, int, int, int, int)':
jail.cpp:156:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  156 |         int mid=l+r>>1;
      |                 ~^~

• Subtask 1: 0 / 5
• Subtask 2: 5 / 5
• Subtask 3: 16 / 16
• Subtask 4: 28 / 28
• Subtask 5: 0 / 12
• Subtask 6: 11 / 11
• Subtask 7: 0 / 23