oj.uz

Submission #719215

# Submission time Handle Problem Language Result Execution time Memory
719215 2023-04-05T16:22:44 Z bin9638 Simurgh (IOI17_simurgh) C++17
70 / 100
 727 ms 4444 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<=10000);
    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 1248 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 1248 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 3 ms 1364 KB correct
15 Correct 3 ms 1364 KB correct
16 Correct 3 ms 1364 KB correct
17 Correct 3 ms 1364 KB correct
18 Correct 3 ms 1492 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 2 ms 1288 KB correct
23 Correct 2 ms 1364 KB correct
24 Correct 2 ms 1364 KB correct
25 Correct 1 ms 1364 KB correct
26 Correct 2 ms 1348 KB correct
27 Correct 2 ms 1364 KB correct
28 Correct 1 ms 1236 KB correct
29 Correct 1 ms 1364 KB correct
30 Correct 2 ms 1364 KB correct
31 Correct 1 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 1248 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 3 ms 1364 KB correct
15 Correct 3 ms 1364 KB correct
16 Correct 3 ms 1364 KB correct
17 Correct 3 ms 1364 KB correct
18 Correct 3 ms 1492 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 2 ms 1288 KB correct
23 Correct 2 ms 1364 KB correct
24 Correct 2 ms 1364 KB correct
25 Correct 1 ms 1364 KB correct
26 Correct 2 ms 1348 KB correct
27 Correct 2 ms 1364 KB correct
28 Correct 1 ms 1236 KB correct
29 Correct 1 ms 1364 KB correct
30 Correct 2 ms 1364 KB correct
31 Correct 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 2 ms 1364 KB correct
34 Correct 102 ms 2004 KB correct
35 Correct 101 ms 2004 KB correct
36 Correct 74 ms 1812 KB correct
37 Correct 15 ms 1412 KB correct
38 Correct 100 ms 2024 KB correct
39 Correct 88 ms 1924 KB correct
40 Correct 73 ms 1796 KB correct
41 Correct 107 ms 2124 KB correct
42 Correct 99 ms 2004 KB correct
43 Correct 32 ms 1724 KB correct
44 Correct 24 ms 1644 KB correct
45 Correct 29 ms 1620 KB correct
46 Correct 21 ms 1616 KB correct
47 Correct 11 ms 1472 KB correct
48 Correct 2 ms 1364 KB correct
49 Correct 4 ms 1364 KB correct
50 Correct 10 ms 1480 KB correct
51 Correct 28 ms 1580 KB correct
52 Correct 24 ms 1648 KB correct
53 Correct 21 ms 1492 KB correct
54 Correct 32 ms 1716 KB correct
55 Correct 30 ms 1620 KB correct
56 Correct 30 ms 1696 KB correct
57 Correct 30 ms 1704 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 389 ms 3240 KB correct
4 Correct 714 ms 4372 KB correct
5 Correct 709 ms 4316 KB correct
6 Correct 702 ms 4348 KB correct
7 Correct 723 ms 4428 KB correct
8 Correct 727 ms 4308 KB correct
9 Correct 705 ms 4348 KB correct
10 Correct 722 ms 4404 KB correct
11 Correct 705 ms 4440 KB correct
12 Correct 719 ms 4348 KB correct
13 Correct 1 ms 1236 KB correct
14 Correct 715 ms 4316 KB correct
15 Correct 699 ms 4444 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 1248 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 3 ms 1364 KB correct
15 Correct 3 ms 1364 KB correct
16 Correct 3 ms 1364 KB correct
17 Correct 3 ms 1364 KB correct
18 Correct 3 ms 1492 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 2 ms 1288 KB correct
23 Correct 2 ms 1364 KB correct
24 Correct 2 ms 1364 KB correct
25 Correct 1 ms 1364 KB correct
26 Correct 2 ms 1348 KB correct
27 Correct 2 ms 1364 KB correct
28 Correct 1 ms 1236 KB correct
29 Correct 1 ms 1364 KB correct
30 Correct 2 ms 1364 KB correct
31 Correct 1 ms 1364 KB correct
32 Correct 1 ms 1364 KB correct
33 Correct 2 ms 1364 KB correct
34 Correct 102 ms 2004 KB correct
35 Correct 101 ms 2004 KB correct
36 Correct 74 ms 1812 KB correct
37 Correct 15 ms 1412 KB correct
38 Correct 100 ms 2024 KB correct
39 Correct 88 ms 1924 KB correct
40 Correct 73 ms 1796 KB correct
41 Correct 107 ms 2124 KB correct
42 Correct 99 ms 2004 KB correct
43 Correct 32 ms 1724 KB correct
44 Correct 24 ms 1644 KB correct
45 Correct 29 ms 1620 KB correct
46 Correct 21 ms 1616 KB correct
47 Correct 11 ms 1472 KB correct
48 Correct 2 ms 1364 KB correct
49 Correct 4 ms 1364 KB correct
50 Correct 10 ms 1480 KB correct
51 Correct 28 ms 1580 KB correct
52 Correct 24 ms 1648 KB correct
53 Correct 21 ms 1492 KB correct
54 Correct 32 ms 1716 KB correct
55 Correct 30 ms 1620 KB correct
56 Correct 30 ms 1696 KB correct
57 Correct 30 ms 1704 KB correct
58 Correct 1 ms 1236 KB correct
59 Correct 1 ms 1236 KB correct
60 Correct 389 ms 3240 KB correct
61 Correct 714 ms 4372 KB correct
62 Correct 709 ms 4316 KB correct
63 Correct 702 ms 4348 KB correct
64 Correct 723 ms 4428 KB correct
65 Correct 727 ms 4308 KB correct
66 Correct 705 ms 4348 KB correct
67 Correct 722 ms 4404 KB correct
68 Correct 705 ms 4440 KB correct
69 Correct 719 ms 4348 KB correct
70 Correct 1 ms 1236 KB correct
71 Correct 715 ms 4316 KB correct
72 Correct 699 ms 4444 KB correct
73 Correct 1 ms 1236 KB correct
74 Incorrect 706 ms 4440 KB WA in grader: NO
75 Halted 0 ms 0 KB -