oj.uz

Submission #1101593

# Submission time Handle Problem Language Result Execution time Memory
1101593 2024-10-16T11:18:06 Z MMihalev Simurgh (IOI17_simurgh) C++14
49 / 100
 3000 ms 5796 KB 
#include<iostream>
#include<algorithm>
#include<set>
#include<queue>
#include "simurgh.h"
using namespace std;
const int MAX_N=5e2+3;
const int MAX_M=125000;
int n,m;
int q;
vector<int>edges;
vector<pair<int,int>>g[MAX_N];
bool used[MAX_N];
vector<int>comp;
vector<vector<int>>comps;
int adj[MAX_N];
int numedge[MAX_N][MAX_N];

bool stat[MAX_M];
bool checked[MAX_M];
int forsure;


bool mm[MAX_N];
bool uu[MAX_N];
int pre[MAX_N];
void reset()
{
    comps.clear();
    edges.clear();
    for(int i=0;i<n;i++)
    {
        adj[i]=-1;
        used[i]=0;
    }
}
void dfs(int u)
{
    if(adj[u]!=-1)
    {
        if(!checked[adj[u]])
        {
            comp.push_back(adj[u]);
        }
        if(stat[adj[u]])forsure=adj[u];
    }
    used[u]=1;
    for(auto [v,edge]:g[u])
    {
        if(used[v])continue;
        edges.push_back(edge);
        dfs(v);
    }
}
void rep(int prev,int edge)
{
    for(int i=0;i<edges.size();i++)
    {
        if(edges[i]==prev){edges[i]=edge;return;}
    }
}
vector<pair<int,int>>s;
int rec(int l,int r)
{
    if(l==r)
    {
        return s[l].first;
    }

    int mid=(l+r)/2;

    int bonus=0;
    edges.clear();
    for(int i=0;i<n;i++)used[i]=0;

    for(int i=l;i<=mid;i++)
    {
        edges.push_back(s[i].first);
        used[s[i].second]=1;
    }

    for(int i=1;i<n;i++)
    {
        if(!used[i]){bonus+=stat[numedge[0][i]];edges.push_back(numedge[0][i]);}
    }

    int cnt=count_common_roads(edges)-bonus;q++;

    if(cnt>0)return rec(l,mid);
    return rec(mid+1,r);
}

bool dfu[MAX_N];
int vers;
void df(int u)
{
    vers++;
    dfu[u]=1;
    for(auto [v,edge]:g[u])
    {
        if(dfu[v] or mm[v]==0)continue;
        df(v);
    }
}
vector<int> find_roads(int N, vector<int> u, vector<int> v)
{
    n=N;
    m=u.size();

    vector<int>ans;
    for(int i=0;i<m;i++)
    {
        g[u[i]].push_back({v[i],i});
        g[v[i]].push_back({u[i],i});
        numedge[u[i]][v[i]]=i;
        numedge[v[i]][u[i]]=i;
    }

    set<pair<int,int>>so;
    int e=0;
    for(int i=0;i<n;i++)
    {
        so.insert({g[i].size(),i});
        pre[i]=g[i].size();
    }

    int cc=0;
    vector<int>verts;
    while(so.size()>0)
    {
        auto f=(*(so.rbegin()));
        so.erase(f);
        int u=f.second;
        verts.push_back(u);
        e+=g[u].size();

        cc++;
        mm[u]=1;
        for(auto [v,edge]:g[u])uu[v]=1;

        for(int i=0;i<n;i++)
        {
            if(mm[i])continue;
            int npre=0;
            for(auto [v,edge]:g[i])
            {
                if(uu[v] or mm[v])continue;

                npre++;
            }
            so.erase({pre[i],i});
            pre[i]=npre;
            so.insert({pre[i],i});
        }

        bool bad=0;
        for(int i=0;i<n;i++)
        {
            if(mm[i])continue;
            if(uu[i])continue;
            bad=1;
            break;
        }
        if(bad==0)
        {
            break;
        }
    }

    int tt=20;
    vector<pair<int,int>>pazo;
    for(int i=0;i<n;i++)
    {
        pazo.push_back({g[i].size(),i});
    }
    sort(pazo.rbegin(),pazo.rend());

    for(auto [sss,i]:pazo)
    {
        if(mm[i])continue;
        if(tt>0)
        {
            e+=g[i].size();
            mm[i]=1;
            verts.push_back(i);
            tt--;
        }
    }

    df(verts[0]);
    if(vers!=verts.size())while(1);


    if(m!=n*(n-1)/2)
    {
        for(int u=0;u<n;u++)
        {
            reset();
            used[u]=1;
            for(auto [v,edge]:g[u])
            {
                adj[v]=edge;
            }
            for(auto [v,edge]:g[u])
            {
                if(!used[v])
                {
                    forsure=-1;
                    comp.clear();
                    dfs(v);
                    if(forsure!=-1)
                    {
                        comp.push_back(forsure);
                    }
                    comps.push_back(comp);
                }
            }

            for(auto c:comps)
            {
                edges.push_back(c[0]);
            }

            for(auto c:comps)
            {
                int ma=count_common_roads(edges);q++;
                vector<int>marked;
                marked.push_back(c[0]);
                int prev=c[0];
                int sega=0;

                for(int edge:c)
                {
                    if(edge==c[0])continue;

                    rep(prev,edge);

                    int cur=count_common_roads(edges);q++;
                    if(cur>ma)
                    {
                        sega++;
                        marked.clear();
                        ma=cur;
                        marked.push_back(edge);
                        if(sega==2)break;
                    }
                    else if(cur==ma)
                    {
                        marked.push_back(edge);
                    }

                    prev=edge;
                }

                for(int edge:marked)stat[edge]=1;
            }

            for(auto [v,edge]:g[u])checked[edge]=1;
        }

    }
    else
    {
        for(int u=0;u<n;u++)
        {
            if(u==0)
            {
                vector<int>marked;
                edges.clear();
                for(int v=2;v<n;v++)
                {
                    edges.push_back(numedge[v-1][v]);
                }

                int ma=-1;

                for(auto [v,edge]:g[u])
                {
                    edges.push_back(edge);
                    int cur=count_common_roads(edges);q++;
                    edges.pop_back();

                    if(cur>ma)
                    {
                        marked.clear();
                        marked.push_back(edge);
                        ma=cur;
                    }
                    else if(cur==ma)marked.push_back(edge);
                }

                for(int edge:marked)stat[edge]=1;

                continue;
            }


            while(1)
            {
                int bonus=0;
                edges.clear();
                s.clear();
                for(int i=0;i<n;i++)used[i]=0;

                for(auto [v,edge]:g[u])
                {
                    if(stat[edge] or v==0)continue;
                    edges.push_back(edge);
                    s.push_back({edge,v});
                    used[v]=1;
                }

                for(int i=1;i<n;i++)
                {
                    if(!used[i]){bonus+=stat[numedge[0][i]];edges.push_back(numedge[0][i]);}
                }

                int cur=count_common_roads(edges)-bonus;q++;

                if(cur==0)break;

                int edge=rec(0,s.size()-1);
                stat[edge]=1;
            }
        }

    }

    for(int i=0;i<m;i++)
    {
        if(stat[i])ans.push_back(i);
    }

    return ans;
}

Compilation message

simurgh.cpp: In function 'void dfs(int)':
simurgh.cpp:48:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   48 |     for(auto [v,edge]:g[u])
      |              ^
simurgh.cpp: In function 'void rep(int, int)':
simurgh.cpp:57:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for(int i=0;i<edges.size();i++)
      |                 ~^~~~~~~~~~~~~
simurgh.cpp: In function 'void df(int)':
simurgh.cpp:99:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   99 |     for(auto [v,edge]:g[u])
      |              ^
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:139:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  139 |         for(auto [v,edge]:g[u])uu[v]=1;
      |                  ^
simurgh.cpp:145:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  145 |             for(auto [v,edge]:g[i])
      |                      ^
simurgh.cpp:178:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  178 |     for(auto [sss,i]:pazo)
      |              ^
simurgh.cpp:191:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  191 |     if(vers!=verts.size())while(1);
      |        ~~~~^~~~~~~~~~~~~~
simurgh.cpp:200:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  200 |             for(auto [v,edge]:g[u])
      |                      ^
simurgh.cpp:204:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  204 |             for(auto [v,edge]:g[u])
      |                      ^
simurgh.cpp:258:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  258 |             for(auto [v,edge]:g[u])checked[edge]=1;
      |                      ^
simurgh.cpp:277:26: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  277 |                 for(auto [v,edge]:g[u])
      |                          ^
simurgh.cpp:305:26: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  305 |                 for(auto [v,edge]:g[u])
      |                          ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB correct
2 Correct 1 ms 504 KB correct
3 Correct 1 ms 336 KB correct
4 Correct 1 ms 336 KB correct
5 Correct 1 ms 336 KB correct
6 Correct 1 ms 336 KB correct
7 Correct 1 ms 336 KB correct
8 Correct 1 ms 336 KB correct
9 Correct 1 ms 336 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 504 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 336 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB correct
2 Correct 1 ms 504 KB correct
3 Correct 1 ms 336 KB correct
4 Correct 1 ms 336 KB correct
5 Correct 1 ms 336 KB correct
6 Correct 1 ms 336 KB correct
7 Correct 1 ms 336 KB correct
8 Correct 1 ms 336 KB correct
9 Correct 1 ms 336 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 504 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 336 KB correct
14 Correct 2 ms 592 KB correct
15 Correct 1 ms 592 KB correct
16 Correct 2 ms 592 KB correct
17 Correct 1 ms 592 KB correct
18 Correct 1 ms 336 KB correct
19 Correct 2 ms 592 KB correct
20 Correct 2 ms 592 KB correct
21 Correct 2 ms 592 KB correct
22 Correct 1 ms 592 KB correct
23 Correct 1 ms 592 KB correct
24 Correct 2 ms 592 KB correct
25 Correct 1 ms 336 KB correct
26 Correct 1 ms 592 KB correct
27 Correct 1 ms 592 KB correct
28 Correct 1 ms 592 KB correct
29 Correct 1 ms 336 KB correct
30 Correct 2 ms 604 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 2 ms 592 KB correct
33 Correct 1 ms 592 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB correct
2 Correct 1 ms 504 KB correct
3 Correct 1 ms 336 KB correct
4 Correct 1 ms 336 KB correct
5 Correct 1 ms 336 KB correct
6 Correct 1 ms 336 KB correct
7 Correct 1 ms 336 KB correct
8 Correct 1 ms 336 KB correct
9 Correct 1 ms 336 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 504 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 336 KB correct
14 Correct 2 ms 592 KB correct
15 Correct 1 ms 592 KB correct
16 Correct 2 ms 592 KB correct
17 Correct 1 ms 592 KB correct
18 Correct 1 ms 336 KB correct
19 Correct 2 ms 592 KB correct
20 Correct 2 ms 592 KB correct
21 Correct 2 ms 592 KB correct
22 Correct 1 ms 592 KB correct
23 Correct 1 ms 592 KB correct
24 Correct 2 ms 592 KB correct
25 Correct 1 ms 336 KB correct
26 Correct 1 ms 592 KB correct
27 Correct 1 ms 592 KB correct
28 Correct 1 ms 592 KB correct
29 Correct 1 ms 336 KB correct
30 Correct 2 ms 604 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 2 ms 592 KB correct
33 Correct 1 ms 592 KB correct
34 Correct 16 ms 1872 KB correct
35 Correct 87 ms 1872 KB correct
36 Correct 61 ms 1616 KB correct
37 Correct 8 ms 1020 KB correct
38 Correct 92 ms 2024 KB correct
39 Correct 79 ms 1872 KB correct
40 Correct 62 ms 1616 KB correct
41 Correct 14 ms 1872 KB correct
42 Correct 94 ms 2020 KB correct
43 Correct 51 ms 1616 KB correct
44 Correct 41 ms 1372 KB correct
45 Correct 49 ms 1476 KB correct
46 Correct 37 ms 1360 KB correct
47 Correct 17 ms 1104 KB correct
48 Execution timed out 3053 ms 848 KB Time limit exceeded
49 Halted 0 ms 0 KB -

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB correct
2 Correct 1 ms 336 KB correct
3 Correct 40 ms 4424 KB correct
4 Correct 60 ms 5712 KB correct
5 Correct 62 ms 5712 KB correct
6 Correct 62 ms 5712 KB correct
7 Correct 55 ms 5712 KB correct
8 Correct 66 ms 5704 KB correct
9 Correct 66 ms 5792 KB correct
10 Correct 65 ms 5796 KB correct
11 Correct 63 ms 5712 KB correct
12 Correct 62 ms 5704 KB correct
13 Correct 1 ms 336 KB correct
14 Correct 60 ms 5684 KB correct
15 Correct 63 ms 5712 KB correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB correct
2 Correct 1 ms 504 KB correct
3 Correct 1 ms 336 KB correct
4 Correct 1 ms 336 KB correct
5 Correct 1 ms 336 KB correct
6 Correct 1 ms 336 KB correct
7 Correct 1 ms 336 KB correct
8 Correct 1 ms 336 KB correct
9 Correct 1 ms 336 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 504 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 336 KB correct
14 Correct 2 ms 592 KB correct
15 Correct 1 ms 592 KB correct
16 Correct 2 ms 592 KB correct
17 Correct 1 ms 592 KB correct
18 Correct 1 ms 336 KB correct
19 Correct 2 ms 592 KB correct
20 Correct 2 ms 592 KB correct
21 Correct 2 ms 592 KB correct
22 Correct 1 ms 592 KB correct
23 Correct 1 ms 592 KB correct
24 Correct 2 ms 592 KB correct
25 Correct 1 ms 336 KB correct
26 Correct 1 ms 592 KB correct
27 Correct 1 ms 592 KB correct
28 Correct 1 ms 592 KB correct
29 Correct 1 ms 336 KB correct
30 Correct 2 ms 604 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 2 ms 592 KB correct
33 Correct 1 ms 592 KB correct
34 Correct 16 ms 1872 KB correct
35 Correct 87 ms 1872 KB correct
36 Correct 61 ms 1616 KB correct
37 Correct 8 ms 1020 KB correct
38 Correct 92 ms 2024 KB correct
39 Correct 79 ms 1872 KB correct
40 Correct 62 ms 1616 KB correct
41 Correct 14 ms 1872 KB correct
42 Correct 94 ms 2020 KB correct
43 Correct 51 ms 1616 KB correct
44 Correct 41 ms 1372 KB correct
45 Correct 49 ms 1476 KB correct
46 Correct 37 ms 1360 KB correct
47 Correct 17 ms 1104 KB correct
48 Execution timed out 3053 ms 848 KB Time limit exceeded
49 Halted 0 ms 0 KB -