oj.uz

Submission #719219

# Submission time Handle Problem Language Result Execution time Memory
719219 2023-04-05T16:26:31 Z bin9638 Simurgh (IOI17_simurgh) C++17
70 / 100
 780 ms 4448 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);
    int my_ans=my_ask(hoi);
    if(val==my_ans)
    {
        for(auto u:s)
            ktr[u]=0;
        return;
    }
    if(val+s.size()==my_ans)
    {
        for(auto u:s)
            ktr[u]=1;
        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,sl=0;
        for(int i=0;i<m;i++)
            if(ktr[i]==-1)
                kt=1;
        if(kt==0)
            break;
        for(int i=0;i<m;i++)
            if(ktr[i]==1)
                sl++;
        if(sl==n-1)
            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:119:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  119 |     if(val+s.size()==my_ans)
      |        ~~~~~~~~~~~~^~~~~~~~
simurgh.cpp:131:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
simurgh.cpp:132:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  132 |         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 1336 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 1336 KB correct
14 Correct 3 ms 1364 KB correct
15 Correct 4 ms 1364 KB correct
16 Correct 3 ms 1364 KB correct
17 Correct 2 ms 1380 KB correct
18 Correct 2 ms 1364 KB correct
19 Correct 3 ms 1364 KB correct
20 Correct 3 ms 1364 KB correct
21 Correct 3 ms 1364 KB correct
22 Correct 1 ms 1364 KB correct
23 Correct 1 ms 1364 KB correct
24 Correct 1 ms 1352 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 1 ms 1364 KB correct
27 Correct 1 ms 1364 KB correct
28 Correct 1 ms 1364 KB correct
29 Correct 1 ms 1236 KB correct
30 Correct 1 ms 1364 KB correct
31 Correct 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 1 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 1336 KB correct
14 Correct 3 ms 1364 KB correct
15 Correct 4 ms 1364 KB correct
16 Correct 3 ms 1364 KB correct
17 Correct 2 ms 1380 KB correct
18 Correct 2 ms 1364 KB correct
19 Correct 3 ms 1364 KB correct
20 Correct 3 ms 1364 KB correct
21 Correct 3 ms 1364 KB correct
22 Correct 1 ms 1364 KB correct
23 Correct 1 ms 1364 KB correct
24 Correct 1 ms 1352 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 1 ms 1364 KB correct
27 Correct 1 ms 1364 KB correct
28 Correct 1 ms 1364 KB correct
29 Correct 1 ms 1236 KB correct
30 Correct 1 ms 1364 KB correct
31 Correct 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 1 ms 1364 KB correct
34 Correct 109 ms 2028 KB correct
35 Correct 103 ms 2012 KB correct
36 Correct 82 ms 1800 KB correct
37 Correct 14 ms 1408 KB correct
38 Correct 107 ms 2032 KB correct
39 Correct 99 ms 1924 KB correct
40 Correct 75 ms 1804 KB correct
41 Correct 106 ms 2028 KB correct
42 Correct 112 ms 2012 KB correct
43 Correct 26 ms 1720 KB correct
44 Correct 20 ms 1652 KB correct
45 Correct 23 ms 1696 KB correct
46 Correct 17 ms 1620 KB correct
47 Correct 8 ms 1476 KB correct
48 Correct 3 ms 1364 KB correct
49 Correct 5 ms 1364 KB correct
50 Correct 8 ms 1364 KB correct
51 Correct 22 ms 1620 KB correct
52 Correct 19 ms 1620 KB correct
53 Correct 22 ms 1616 KB correct
54 Correct 26 ms 1720 KB correct
55 Correct 30 ms 1760 KB correct
56 Correct 25 ms 1620 KB correct
57 Correct 25 ms 1696 KB correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1236 KB correct
2 Correct 1 ms 1236 KB correct
3 Correct 450 ms 3256 KB correct
4 Correct 762 ms 4316 KB correct
5 Correct 765 ms 4348 KB correct
6 Correct 751 ms 4348 KB correct
7 Correct 771 ms 4316 KB correct
8 Correct 777 ms 4444 KB correct
9 Correct 765 ms 4312 KB correct
10 Correct 766 ms 4352 KB correct
11 Correct 741 ms 4352 KB correct
12 Correct 771 ms 4344 KB correct
13 Correct 1 ms 1236 KB correct
14 Correct 780 ms 4448 KB correct
15 Correct 747 ms 4352 KB correct

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 1336 KB correct
14 Correct 3 ms 1364 KB correct
15 Correct 4 ms 1364 KB correct
16 Correct 3 ms 1364 KB correct
17 Correct 2 ms 1380 KB correct
18 Correct 2 ms 1364 KB correct
19 Correct 3 ms 1364 KB correct
20 Correct 3 ms 1364 KB correct
21 Correct 3 ms 1364 KB correct
22 Correct 1 ms 1364 KB correct
23 Correct 1 ms 1364 KB correct
24 Correct 1 ms 1352 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 1 ms 1364 KB correct
27 Correct 1 ms 1364 KB correct
28 Correct 1 ms 1364 KB correct
29 Correct 1 ms 1236 KB correct
30 Correct 1 ms 1364 KB correct
31 Correct 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 1 ms 1364 KB correct
34 Correct 109 ms 2028 KB correct
35 Correct 103 ms 2012 KB correct
36 Correct 82 ms 1800 KB correct
37 Correct 14 ms 1408 KB correct
38 Correct 107 ms 2032 KB correct
39 Correct 99 ms 1924 KB correct
40 Correct 75 ms 1804 KB correct
41 Correct 106 ms 2028 KB correct
42 Correct 112 ms 2012 KB correct
43 Correct 26 ms 1720 KB correct
44 Correct 20 ms 1652 KB correct
45 Correct 23 ms 1696 KB correct
46 Correct 17 ms 1620 KB correct
47 Correct 8 ms 1476 KB correct
48 Correct 3 ms 1364 KB correct
49 Correct 5 ms 1364 KB correct
50 Correct 8 ms 1364 KB correct
51 Correct 22 ms 1620 KB correct
52 Correct 19 ms 1620 KB correct
53 Correct 22 ms 1616 KB correct
54 Correct 26 ms 1720 KB correct
55 Correct 30 ms 1760 KB correct
56 Correct 25 ms 1620 KB correct
57 Correct 25 ms 1696 KB correct
58 Correct 1 ms 1236 KB correct
59 Correct 1 ms 1236 KB correct
60 Correct 450 ms 3256 KB correct
61 Correct 762 ms 4316 KB correct
62 Correct 765 ms 4348 KB correct
63 Correct 751 ms 4348 KB correct
64 Correct 771 ms 4316 KB correct
65 Correct 777 ms 4444 KB correct
66 Correct 765 ms 4312 KB correct
67 Correct 766 ms 4352 KB correct
68 Correct 741 ms 4352 KB correct
69 Correct 771 ms 4344 KB correct
70 Correct 1 ms 1236 KB correct
71 Correct 780 ms 4448 KB correct
72 Correct 747 ms 4352 KB correct
73 Correct 1 ms 1236 KB correct
74 Incorrect 740 ms 4344 KB WA in grader: NO
75 Halted 0 ms 0 KB -