oj.uz

Submission #1101592

# Submission time Handle Problem Language Result Execution time Memory
1101592 2024-10-16T11:17:47 Z MMihalev Simurgh (IOI17_simurgh) C++14
49 / 100
 3000 ms 5780 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=10;
    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 336 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 336 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 504 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 336 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 336 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 504 KB correct
14 Correct 1 ms 592 KB correct
15 Correct 2 ms 592 KB correct
16 Correct 1 ms 592 KB correct
17 Correct 2 ms 592 KB correct
18 Correct 1 ms 592 KB correct
19 Correct 2 ms 592 KB correct
20 Correct 2 ms 592 KB correct
21 Correct 1 ms 592 KB correct
22 Correct 2 ms 592 KB correct
23 Correct 1 ms 760 KB correct
24 Correct 2 ms 592 KB correct
25 Correct 1 ms 580 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 592 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 1 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 336 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 336 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 504 KB correct
14 Correct 1 ms 592 KB correct
15 Correct 2 ms 592 KB correct
16 Correct 1 ms 592 KB correct
17 Correct 2 ms 592 KB correct
18 Correct 1 ms 592 KB correct
19 Correct 2 ms 592 KB correct
20 Correct 2 ms 592 KB correct
21 Correct 1 ms 592 KB correct
22 Correct 2 ms 592 KB correct
23 Correct 1 ms 760 KB correct
24 Correct 2 ms 592 KB correct
25 Correct 1 ms 580 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 592 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 1 ms 592 KB correct
33 Correct 1 ms 592 KB correct
34 Correct 14 ms 2016 KB correct
35 Correct 92 ms 1872 KB correct
36 Correct 61 ms 1616 KB correct
37 Execution timed out 3075 ms 1016 KB Time limit exceeded
38 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 39 ms 4412 KB correct
4 Correct 61 ms 5712 KB correct
5 Correct 62 ms 5712 KB correct
6 Correct 60 ms 5712 KB correct
7 Correct 54 ms 5704 KB correct
8 Correct 69 ms 5712 KB correct
9 Correct 61 ms 5712 KB correct
10 Correct 61 ms 5780 KB correct
11 Correct 61 ms 5712 KB correct
12 Correct 73 ms 5712 KB correct
13 Correct 1 ms 336 KB correct
14 Correct 59 ms 5712 KB correct
15 Correct 61 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 336 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 336 KB correct
12 Correct 1 ms 336 KB correct
13 Correct 1 ms 504 KB correct
14 Correct 1 ms 592 KB correct
15 Correct 2 ms 592 KB correct
16 Correct 1 ms 592 KB correct
17 Correct 2 ms 592 KB correct
18 Correct 1 ms 592 KB correct
19 Correct 2 ms 592 KB correct
20 Correct 2 ms 592 KB correct
21 Correct 1 ms 592 KB correct
22 Correct 2 ms 592 KB correct
23 Correct 1 ms 760 KB correct
24 Correct 2 ms 592 KB correct
25 Correct 1 ms 580 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 592 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 1 ms 592 KB correct
33 Correct 1 ms 592 KB correct
34 Correct 14 ms 2016 KB correct
35 Correct 92 ms 1872 KB correct
36 Correct 61 ms 1616 KB correct
37 Execution timed out 3075 ms 1016 KB Time limit exceeded
38 Halted 0 ms 0 KB -