oj.uz

Submission #719220

# Submission time Handle Problem Language Result Execution time Memory
719220 2023-04-05T16:29:31 Z bin9638 Simurgh (IOI17_simurgh) C++17
51 / 100
 1302 ms 3276 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;
}

bool solve(vector<int>s)
{
    if(s.empty())
        return 0;
    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 0;
    }
    if(val+s.size()==my_ans)
    {
        for(auto u:s)
            ktr[u]=1;
        return 1;
    }
    if(s.size()==1)
    {
        ktr[s[0]]=1;
        return 1;
    }
    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]);
    if(solve(L)==0)
        return 0;
    return 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 'bool 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 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 6 ms 1364 KB correct
15 Correct 5 ms 1364 KB correct
16 Correct 6 ms 1364 KB correct
17 Correct 5 ms 1364 KB correct
18 Correct 3 ms 1360 KB correct
19 Correct 5 ms 1376 KB correct
20 Correct 5 ms 1364 KB correct
21 Correct 4 ms 1364 KB correct
22 Correct 1 ms 1364 KB correct
23 Correct 1 ms 1364 KB correct
24 Correct 1 ms 1364 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 1 ms 1364 KB correct
27 Correct 1 ms 1236 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 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 1236 KB correct
14 Correct 6 ms 1364 KB correct
15 Correct 5 ms 1364 KB correct
16 Correct 6 ms 1364 KB correct
17 Correct 5 ms 1364 KB correct
18 Correct 3 ms 1360 KB correct
19 Correct 5 ms 1376 KB correct
20 Correct 5 ms 1364 KB correct
21 Correct 4 ms 1364 KB correct
22 Correct 1 ms 1364 KB correct
23 Correct 1 ms 1364 KB correct
24 Correct 1 ms 1364 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 1 ms 1364 KB correct
27 Correct 1 ms 1236 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 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 1 ms 1364 KB correct
34 Correct 341 ms 2012 KB correct
35 Correct 321 ms 2124 KB correct
36 Correct 240 ms 1804 KB correct
37 Correct 44 ms 1400 KB correct
38 Correct 337 ms 2016 KB correct
39 Correct 275 ms 1876 KB correct
40 Correct 240 ms 1932 KB correct
41 Correct 362 ms 2028 KB correct
42 Correct 314 ms 2032 KB correct
43 Correct 23 ms 1720 KB correct
44 Correct 22 ms 1620 KB correct
45 Correct 24 ms 1700 KB correct
46 Correct 17 ms 1616 KB correct
47 Correct 8 ms 1476 KB correct
48 Correct 3 ms 1364 KB correct
49 Correct 4 ms 1364 KB correct
50 Correct 12 ms 1472 KB correct
51 Correct 26 ms 1584 KB correct
52 Correct 21 ms 1620 KB correct
53 Correct 17 ms 1616 KB correct
54 Correct 24 ms 1588 KB correct
55 Correct 24 ms 1620 KB correct
56 Correct 25 ms 1700 KB correct
57 Correct 26 ms 1620 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 Incorrect 1302 ms 3276 KB WA in grader: NO
4 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 6 ms 1364 KB correct
15 Correct 5 ms 1364 KB correct
16 Correct 6 ms 1364 KB correct
17 Correct 5 ms 1364 KB correct
18 Correct 3 ms 1360 KB correct
19 Correct 5 ms 1376 KB correct
20 Correct 5 ms 1364 KB correct
21 Correct 4 ms 1364 KB correct
22 Correct 1 ms 1364 KB correct
23 Correct 1 ms 1364 KB correct
24 Correct 1 ms 1364 KB correct
25 Correct 1 ms 1236 KB correct
26 Correct 1 ms 1364 KB correct
27 Correct 1 ms 1236 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 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 1 ms 1364 KB correct
34 Correct 341 ms 2012 KB correct
35 Correct 321 ms 2124 KB correct
36 Correct 240 ms 1804 KB correct
37 Correct 44 ms 1400 KB correct
38 Correct 337 ms 2016 KB correct
39 Correct 275 ms 1876 KB correct
40 Correct 240 ms 1932 KB correct
41 Correct 362 ms 2028 KB correct
42 Correct 314 ms 2032 KB correct
43 Correct 23 ms 1720 KB correct
44 Correct 22 ms 1620 KB correct
45 Correct 24 ms 1700 KB correct
46 Correct 17 ms 1616 KB correct
47 Correct 8 ms 1476 KB correct
48 Correct 3 ms 1364 KB correct
49 Correct 4 ms 1364 KB correct
50 Correct 12 ms 1472 KB correct
51 Correct 26 ms 1584 KB correct
52 Correct 21 ms 1620 KB correct
53 Correct 17 ms 1616 KB correct
54 Correct 24 ms 1588 KB correct
55 Correct 24 ms 1620 KB correct
56 Correct 25 ms 1700 KB correct
57 Correct 26 ms 1620 KB correct
58 Correct 1 ms 1236 KB correct
59 Correct 1 ms 1236 KB correct
60 Incorrect 1302 ms 3276 KB WA in grader: NO
61 Halted 0 ms 0 KB -