oj.uz

Submission #814719

# Submission time Handle Problem Language Result Execution time Memory
814719 2023-08-08T09:16:44 Z groshi Jail (JOI22_jail) C++17
0 / 100
 2 ms 1620 KB 
#include<bits/stdc++.h>
#define int long long
using namespace std;
struct wi{
    vector<int> Q;
    int skoki[20];
    int poziom=0;
    vector<int> po;
    int przed=0;
}*w;
int pocz[130000];
int kon[130000];
int mam[130000][2];
void pusc(int x)
{
    int gdzie=0;
    while(w[w[x].skoki[gdzie]].skoki[gdzie]!=0)
    {
        w[x].skoki[gdzie+1]=w[w[x].skoki[gdzie]].skoki[gdzie];
        gdzie++;
    }
}
void dfs(int x,int ojc)
{
    w[x].poziom=w[ojc].poziom+1;
    for(int i=0;i<w[x].Q.size();i++)
    {
        int pom=w[x].Q[i];
        if(pom==ojc)
        continue;
        w[pom].skoki[0]=x;
        pusc(pom);
        dfs(pom,x);
    }
}
int lca(int x,int y)
{
    if(w[x].poziom>w[y].poziom)
        swap(x,y);
    for(int i=19;i>=0;i--)
        if(w[w[y].skoki[i]].poziom>=w[x].poziom)
            y=w[y].skoki[i];
    if(x==y)
        return x;
    for(int i=19;i>=0;i--)
        if(w[x].skoki[i]!=w[y].skoki[i])
            x=w[x].skoki[i],y=w[y].skoki[i];
    return w[x].skoki[0];
}
void lec(int x,int y,int kto)
{
    while(x!=y)
    {
        if(pocz[x]!=0 && pocz[x]!=kto)
        {
            w[kto].przed++;
            w[pocz[x]].po.push_back(kto);
        }
        if(kon[x]!=0 && kon[x]!=kto)
        {
            w[kto].po.push_back(kon[x]);
            w[kon[x]].przed++;
        }
        x=w[x].skoki[0];
    }
}
int32_t main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    int zap;
    cin>>zap;
    while(zap--)
    {
        int n,x,y;
        cin>>n;
        w=new wi[n+3];
        for(int i=1;i<n;i++)
        {
            cin>>x>>y;
            w[x].Q.push_back(y);
            w[y].Q.push_back(x);
        }
        dfs(1,0);
        int m;
        cin>>m;
        for(int i=1;i<=m;i++)
        {
            cin>>x>>y;
            pocz[x]=i;
            kon[y]=i;
            mam[i][0]=x;
            mam[i][1]=y;
        }
        for(int i=1;i<=m;i++)
        {
            x=mam[i][0];
            y=mam[i][1];
            int lcaa=lca(x,y);
            lec(x,lcaa,i);
            lec(y,lcaa,i);
            if(pocz[lcaa]!=0 && pocz[lcaa]!=i)
            {
                w[i].przed++;
                w[pocz[lcaa]].po.push_back(i);
            }
            if(kon[lcaa]!=0 && kon[lcaa]!=i)
            {
                w[i].po.push_back(kon[lcaa]);
                w[kon[lcaa]].przed++;
            }
        }
        int ilu=0;
        vector<int> mam;
        for(int i=1;i<=m;i++)
            if(w[i].przed==0)
                mam.push_back(i);
        while(mam.size())
        {
            int x=mam.back();
            mam.pop_back();
            ilu++;
            for(int i=0;i<w[x].po.size();i++)
            {
                w[w[x].po[i]].przed--;
                if(w[w[x].po[i]].przed==0)
                    mam.push_back(w[x].po[i]);
            }
        }
        if(ilu==m)
            cout<<"Yes\n";
        else cout<<"No\n";
    }
    return 0;
}

Compilation message

jail.cpp: In function 'void dfs(long long int, long long int)':
jail.cpp:26:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
jail.cpp: In function 'int32_t main()':
jail.cpp:124:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |             for(int i=0;i<w[x].po.size();i++)
      |                         ~^~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 360 KB Output is correct
3 Incorrect 2 ms 1620 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 360 KB Output is correct
3 Incorrect 2 ms 1620 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 360 KB Output is correct
3 Incorrect 2 ms 1620 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 360 KB Output is correct
3 Incorrect 2 ms 1620 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Incorrect 0 ms 340 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -