oj.uz

Submission #719214

# Submission time Handle Problem Language Result Execution time Memory
719214 2023-04-05T16:21:43 Z bin9638 Simurgh (IOI17_simurgh) C++17
51 / 100
 785 ms 8568 KB 
#include <bits/stdc++.h>

#ifndef SKY
#include "simurgh.h"
#endif // SKY

using namespace std;

#define N  510
#define ll long long
#define fs first
#define sc second
#define ii pair<int,int>
#define pb push_back

int tmp[N],n,m,times,ktr[N*N],par_id[N];
ii cnt[N],canh[N*N];
vector<ii>g[N];
vector<int>lis;

struct DSU
{
    int lab[N];

    void init()
    {
        memset(lab,-1,sizeof(lab));
    }

    int root(int u)
    {
        if(lab[u]<0)
            return u;
        return(lab[u]=root(lab[u]));
    }

    bool update(int u,int v)
    {
        if((u=root(u))==(v=root(v)))
            return 0;
        if(lab[u]>lab[v])
            swap(u,v);
        lab[u]+=lab[v];
        lab[v]=u;
        return 1;
    }
}T;

#ifdef SKY
int chon[N*N];
int count_common_roads(vector<int>r)
{
    int res=0;
    for(auto i:r)
        res+=chon[i];
    return res;
}
#endif // SKY

int query=0;

int my_ask(vector<int>r)
{
    assert(r.size()==n-1);
    query++;
    assert(query<=8000);
    return count_common_roads(r);
}

void DFS(int u,int p)
{
    cnt[u].fs=++times;
    for(auto v:g[u])
        if(v.fs!=p)
        {
            par_id[v.fs]=v.sc;
            DFS(v.fs,u);
        }
    cnt[u].sc=times;
}

bool tren(int u,int v)
{
    return (cnt[u].fs<=cnt[v].fs&&cnt[u].sc>=cnt[v].sc);
}

ii get_cnt(int u,int v)
{
    ii res={0,0};
    for(int i=0;i<n;i++)
        if(tren(i,u)+tren(i,v)==1)
        {
            if(ktr[par_id[i]]==-1)
                res.fs++;
                    else res.sc++;
        }
    return res;
}

void solve(vector<int>s)
{
    if(s.empty())
        return;
    vector<int>hoi;
    T.init();
    for(auto u:s)
        T.update(canh[u].fs,canh[u].sc),hoi.pb(u);
    int val=0;
    for(auto i:lis)
        if(T.update(canh[i].fs,canh[i].sc))
            val+=ktr[i],hoi.pb(i);
    if(val==my_ask(hoi))
    {
        for(auto u:s)
            ktr[u]=0;
        return;
    }
    if(s.size()==1)
    {
        ktr[s[0]]=1;
        return;
    }
    vector<int>L,R;
    for(int i=0;i<s.size();i++)
        if(i*2<s.size())
            L.pb(s[i]);
                else R.pb(s[i]);
    solve(L);
    solve(R);
}

vector<int> find_roads(int cc, vector<int> canh_fs, vector<int> canh_sc)
{
    n=cc;
    m=canh_fs.size();
    for(int i=0;i<m;i++)
        canh[i]={canh_fs[i],canh_sc[i]};
    memset(ktr,-1,sizeof(ktr));
    T.init();
    for(int i=0;i<m;i++)
        if(T.update(canh[i].fs,canh[i].sc))
        {
            lis.pb(i);
           // cout<<i<<endl;
            g[canh[i].fs].pb({canh[i].sc,i});
            g[canh[i].sc].pb({canh[i].fs,i});
        }
    memset(par_id,-1,sizeof(par_id));
    DFS(0,-1);
    int val=my_ask(lis);
    //cout<<val<<endl;
   for(int i=0;i<m;i++)
   {
       ii cc=get_cnt(canh[i].fs,canh[i].sc);
       if(cc.fs>0&&cc.fs+cc.sc>1)
       {
            int u=canh[i].fs,v=canh[i].sc;
            if(cc.sc==0)
            {
                int kt=0;
                for(int j=0;j<n;j++)
                    if(tren(j,u)+tren(j,v)==1)
                    {
                        vector<int>luu=lis;
                        for(int t=0;t<n-1;t++)
                            if(luu[t]==par_id[j])
                                luu[t]=i;
                        tmp[j]=my_ask(luu);
                        if(tmp[j]>val)
                            kt=1;
                    }
                for(int j=0;j<n;j++)
                    if(tren(j,u)+tren(j,v)==1)
                    {
                       if(kt==0)
                       {
                           ktr[par_id[j]]=(tmp[j]<val);
                       }else
                       {
                            ktr[par_id[j]]=(tmp[j]==val);
                       }
                    }
            }else
            {
                int kt=0;
                for(int j=0;j<n;j++)
                    if(tren(j,u)+tren(j,v)==1&&ktr[par_id[j]]!=-1)
                    {
                        vector<int>luu=lis;
                        for(int t=0;t<n-1;t++)
                            if(luu[t]==par_id[j])
                                luu[t]=i;
                        if(ktr[par_id[j]]==0)
                        {
                            kt=(my_ask(luu)>val);
                        }else
                        {
                            kt=(my_ask(luu)==val);
                        }
                        break;
                    }
                 for(int j=0;j<n;j++)
                    if(tren(j,u)+tren(j,v)==1&&ktr[par_id[j]]==-1)
                    {
                        vector<int>luu=lis;
                        for(int t=0;t<n-1;t++)
                            if(luu[t]==par_id[j])
                                luu[t]=i;
                        tmp[j]=my_ask(luu);
                       if(kt==0)
                       {
                           ktr[par_id[j]]=(tmp[j]<val);
                       }else
                       {
                            ktr[par_id[j]]=(tmp[j]==val);
                       }
                    }
            }
       }
   }
    for(auto i:lis)
        if(ktr[i]==-1)
            ktr[i]=1;
    while(1)
    {
        int kt=0;
        for(int i=0;i<m;i++)
            if(ktr[i]==-1)
                kt=1;
        if(kt==0)
            break;
        T.init();
        vector<int>s;
        for(int i=0;i<m;i++)
            if(ktr[i]==-1&&T.update(canh[i].fs,canh[i].sc))
                s.pb(i);
        solve(s);
    }
    vector<int>kq;
    for(int i=0;i<m;i++)
        if(ktr[i]==1)
            kq.pb(i);
    return kq;
}

#ifdef SKY
int main()
{
    freopen("A.inp","r",stdin);
    freopen("A.out","w",stdout);
    ios::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,m;
    cin>>n>>m;
    vector<int>u,v;
    for(int i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        u.pb(x);
        v.pb(y);
    }
    for(int i=1;i<n;i++)
    {
        int u;
        cin>>u;
      //  cout<<u<<endl;
        chon[u]=1;
    }
    vector<int>kq=find_roads(n,u,v);
    cout<<"ASK "<<query<<endl;
    for(int i=0;i<n-1;i++)cout<<kq[i]<<"\n";
    return 0;
}
#endif

Compilation message

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from simurgh.cpp:1:
simurgh.cpp: In function 'int my_ask(std::vector<int>)':
simurgh.cpp:64:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   64 |     assert(r.size()==n-1);
      |            ~~~~~~~~^~~~~
simurgh.cpp: In function 'void solve(std::vector<int>)':
simurgh.cpp:124:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
simurgh.cpp:125:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  125 |         if(i*2<s.size())
      |            ~~~^~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1236 KB correct
2 Correct 1 ms 1236 KB correct
3 Correct 1 ms 1236 KB correct
4 Correct 1 ms 1236 KB correct
5 Correct 1 ms 1236 KB correct
6 Correct 1 ms 1236 KB correct
7 Correct 1 ms 1236 KB correct
8 Correct 1 ms 1236 KB correct
9 Correct 1 ms 1236 KB correct
10 Correct 1 ms 1236 KB correct
11 Correct 1 ms 1236 KB correct
12 Correct 1 ms 1236 KB correct
13 Correct 1 ms 1236 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1236 KB correct
2 Correct 1 ms 1236 KB correct
3 Correct 1 ms 1236 KB correct
4 Correct 1 ms 1236 KB correct
5 Correct 1 ms 1236 KB correct
6 Correct 1 ms 1236 KB correct
7 Correct 1 ms 1236 KB correct
8 Correct 1 ms 1236 KB correct
9 Correct 1 ms 1236 KB correct
10 Correct 1 ms 1236 KB correct
11 Correct 1 ms 1236 KB correct
12 Correct 1 ms 1236 KB correct
13 Correct 1 ms 1236 KB correct
14 Correct 4 ms 1364 KB correct
15 Correct 3 ms 1364 KB correct
16 Correct 4 ms 1364 KB correct
17 Correct 3 ms 1364 KB correct
18 Correct 3 ms 1364 KB correct
19 Correct 4 ms 1364 KB correct
20 Correct 3 ms 1364 KB correct
21 Correct 2 ms 1364 KB correct
22 Correct 2 ms 1364 KB correct
23 Correct 2 ms 1364 KB correct
24 Correct 2 ms 1364 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 2 ms 1364 KB correct
27 Correct 2 ms 1364 KB correct
28 Correct 1 ms 1364 KB correct
29 Correct 1 ms 1364 KB correct
30 Correct 1 ms 1364 KB correct
31 Correct 2 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 2 ms 1364 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1236 KB correct
2 Correct 1 ms 1236 KB correct
3 Correct 1 ms 1236 KB correct
4 Correct 1 ms 1236 KB correct
5 Correct 1 ms 1236 KB correct
6 Correct 1 ms 1236 KB correct
7 Correct 1 ms 1236 KB correct
8 Correct 1 ms 1236 KB correct
9 Correct 1 ms 1236 KB correct
10 Correct 1 ms 1236 KB correct
11 Correct 1 ms 1236 KB correct
12 Correct 1 ms 1236 KB correct
13 Correct 1 ms 1236 KB correct
14 Correct 4 ms 1364 KB correct
15 Correct 3 ms 1364 KB correct
16 Correct 4 ms 1364 KB correct
17 Correct 3 ms 1364 KB correct
18 Correct 3 ms 1364 KB correct
19 Correct 4 ms 1364 KB correct
20 Correct 3 ms 1364 KB correct
21 Correct 2 ms 1364 KB correct
22 Correct 2 ms 1364 KB correct
23 Correct 2 ms 1364 KB correct
24 Correct 2 ms 1364 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 2 ms 1364 KB correct
27 Correct 2 ms 1364 KB correct
28 Correct 1 ms 1364 KB correct
29 Correct 1 ms 1364 KB correct
30 Correct 1 ms 1364 KB correct
31 Correct 2 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 2 ms 1364 KB correct
34 Correct 121 ms 2016 KB correct
35 Correct 109 ms 2012 KB correct
36 Correct 80 ms 1804 KB correct
37 Correct 18 ms 1408 KB correct
38 Correct 114 ms 2016 KB correct
39 Correct 98 ms 1928 KB correct
40 Correct 79 ms 1804 KB correct
41 Correct 115 ms 2032 KB correct
42 Correct 123 ms 2152 KB correct
43 Correct 42 ms 1716 KB correct
44 Correct 33 ms 1568 KB correct
45 Correct 38 ms 1580 KB correct
46 Correct 25 ms 1604 KB correct
47 Correct 10 ms 1364 KB correct
48 Correct 3 ms 1364 KB correct
49 Correct 5 ms 1364 KB correct
50 Correct 11 ms 1364 KB correct
51 Correct 30 ms 1632 KB correct
52 Correct 28 ms 1640 KB correct
53 Correct 24 ms 1492 KB correct
54 Correct 35 ms 1696 KB correct
55 Correct 42 ms 1620 KB correct
56 Correct 38 ms 1620 KB correct
57 Correct 36 ms 1696 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1236 KB correct
2 Correct 1 ms 1236 KB correct
3 Correct 452 ms 3280 KB correct
4 Runtime error 785 ms 8568 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1236 KB correct
2 Correct 1 ms 1236 KB correct
3 Correct 1 ms 1236 KB correct
4 Correct 1 ms 1236 KB correct
5 Correct 1 ms 1236 KB correct
6 Correct 1 ms 1236 KB correct
7 Correct 1 ms 1236 KB correct
8 Correct 1 ms 1236 KB correct
9 Correct 1 ms 1236 KB correct
10 Correct 1 ms 1236 KB correct
11 Correct 1 ms 1236 KB correct
12 Correct 1 ms 1236 KB correct
13 Correct 1 ms 1236 KB correct
14 Correct 4 ms 1364 KB correct
15 Correct 3 ms 1364 KB correct
16 Correct 4 ms 1364 KB correct
17 Correct 3 ms 1364 KB correct
18 Correct 3 ms 1364 KB correct
19 Correct 4 ms 1364 KB correct
20 Correct 3 ms 1364 KB correct
21 Correct 2 ms 1364 KB correct
22 Correct 2 ms 1364 KB correct
23 Correct 2 ms 1364 KB correct
24 Correct 2 ms 1364 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 2 ms 1364 KB correct
27 Correct 2 ms 1364 KB correct
28 Correct 1 ms 1364 KB correct
29 Correct 1 ms 1364 KB correct
30 Correct 1 ms 1364 KB correct
31 Correct 2 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 2 ms 1364 KB correct
34 Correct 121 ms 2016 KB correct
35 Correct 109 ms 2012 KB correct
36 Correct 80 ms 1804 KB correct
37 Correct 18 ms 1408 KB correct
38 Correct 114 ms 2016 KB correct
39 Correct 98 ms 1928 KB correct
40 Correct 79 ms 1804 KB correct
41 Correct 115 ms 2032 KB correct
42 Correct 123 ms 2152 KB correct
43 Correct 42 ms 1716 KB correct
44 Correct 33 ms 1568 KB correct
45 Correct 38 ms 1580 KB correct
46 Correct 25 ms 1604 KB correct
47 Correct 10 ms 1364 KB correct
48 Correct 3 ms 1364 KB correct
49 Correct 5 ms 1364 KB correct
50 Correct 11 ms 1364 KB correct
51 Correct 30 ms 1632 KB correct
52 Correct 28 ms 1640 KB correct
53 Correct 24 ms 1492 KB correct
54 Correct 35 ms 1696 KB correct
55 Correct 42 ms 1620 KB correct
56 Correct 38 ms 1620 KB correct
57 Correct 36 ms 1696 KB correct
58 Correct 1 ms 1236 KB correct
59 Correct 1 ms 1236 KB correct
60 Correct 452 ms 3280 KB correct
61 Runtime error 785 ms 8568 KB Execution killed with signal 6
62 Halted 0 ms 0 KB -