oj.uz

Submission #1100510

# Submission time Handle Problem Language Result Execution time Memory
1100510 2024-10-14T06:36:48 Z MMihalev Simurgh (IOI17_simurgh) C++14
51 / 100
 3000 ms 4420 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;

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);
}
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;
    }

    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;
            }
        }

        if(q>3000)while(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:44:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   44 |     for(auto [v,edge]:g[u])
      |              ^
simurgh.cpp: In function 'void rep(int, int)':
simurgh.cpp:53:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for(int i=0;i<edges.size();i++)
      |                 ~^~~~~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:108:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  108 |             for(auto [v,edge]:g[u])
      |                      ^
simurgh.cpp:112:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  112 |             for(auto [v,edge]:g[u])
      |                      ^
simurgh.cpp:166:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  166 |             for(auto [v,edge]:g[u])checked[edge]=1;
      |                      ^
simurgh.cpp:185:26: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  185 |                 for(auto [v,edge]:g[u])
      |                          ^
simurgh.cpp:213:26: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  213 |                 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 508 KB correct
8 Correct 1 ms 348 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 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 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 508 KB correct
8 Correct 1 ms 348 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 336 KB correct
14 Correct 1 ms 592 KB correct
15 Correct 1 ms 592 KB correct
16 Correct 1 ms 592 KB correct
17 Correct 2 ms 592 KB correct
18 Correct 1 ms 336 KB correct
19 Correct 1 ms 592 KB correct
20 Correct 1 ms 592 KB correct
21 Correct 1 ms 592 KB correct
22 Correct 1 ms 592 KB correct
23 Correct 1 ms 592 KB correct
24 Correct 1 ms 384 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 336 KB correct
29 Correct 1 ms 336 KB correct
30 Correct 1 ms 592 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 1 ms 592 KB correct
33 Correct 1 ms 336 KB correct

Subtask #3
21.0 / 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 508 KB correct
8 Correct 1 ms 348 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 336 KB correct
14 Correct 1 ms 592 KB correct
15 Correct 1 ms 592 KB correct
16 Correct 1 ms 592 KB correct
17 Correct 2 ms 592 KB correct
18 Correct 1 ms 336 KB correct
19 Correct 1 ms 592 KB correct
20 Correct 1 ms 592 KB correct
21 Correct 1 ms 592 KB correct
22 Correct 1 ms 592 KB correct
23 Correct 1 ms 592 KB correct
24 Correct 1 ms 384 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 336 KB correct
29 Correct 1 ms 336 KB correct
30 Correct 1 ms 592 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 1 ms 592 KB correct
33 Correct 1 ms 336 KB correct
34 Correct 14 ms 1872 KB correct
35 Correct 93 ms 2016 KB correct
36 Correct 64 ms 1616 KB correct
37 Correct 6 ms 848 KB correct
38 Correct 95 ms 1872 KB correct
39 Correct 81 ms 1872 KB correct
40 Correct 64 ms 1856 KB correct
41 Correct 14 ms 1872 KB correct
42 Correct 89 ms 1872 KB correct
43 Correct 51 ms 1616 KB correct
44 Correct 46 ms 1360 KB correct
45 Correct 48 ms 1652 KB correct
46 Correct 36 ms 1360 KB correct
47 Correct 17 ms 1104 KB correct
48 Correct 3 ms 848 KB correct
49 Correct 6 ms 848 KB correct
50 Correct 17 ms 1104 KB correct
51 Correct 47 ms 1488 KB correct
52 Correct 41 ms 1408 KB correct
53 Correct 38 ms 1360 KB correct
54 Correct 50 ms 1616 KB correct
55 Correct 47 ms 1304 KB correct
56 Correct 47 ms 1360 KB correct
57 Correct 47 ms 1652 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB correct
2 Correct 1 ms 336 KB correct
3 Execution timed out 3085 ms 4420 KB Time limit exceeded
4 Halted 0 ms 0 KB -

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 508 KB correct
8 Correct 1 ms 348 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 336 KB correct
14 Correct 1 ms 592 KB correct
15 Correct 1 ms 592 KB correct
16 Correct 1 ms 592 KB correct
17 Correct 2 ms 592 KB correct
18 Correct 1 ms 336 KB correct
19 Correct 1 ms 592 KB correct
20 Correct 1 ms 592 KB correct
21 Correct 1 ms 592 KB correct
22 Correct 1 ms 592 KB correct
23 Correct 1 ms 592 KB correct
24 Correct 1 ms 384 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 336 KB correct
29 Correct 1 ms 336 KB correct
30 Correct 1 ms 592 KB correct
31 Correct 1 ms 592 KB correct
32 Correct 1 ms 592 KB correct
33 Correct 1 ms 336 KB correct
34 Correct 14 ms 1872 KB correct
35 Correct 93 ms 2016 KB correct
36 Correct 64 ms 1616 KB correct
37 Correct 6 ms 848 KB correct
38 Correct 95 ms 1872 KB correct
39 Correct 81 ms 1872 KB correct
40 Correct 64 ms 1856 KB correct
41 Correct 14 ms 1872 KB correct
42 Correct 89 ms 1872 KB correct
43 Correct 51 ms 1616 KB correct
44 Correct 46 ms 1360 KB correct
45 Correct 48 ms 1652 KB correct
46 Correct 36 ms 1360 KB correct
47 Correct 17 ms 1104 KB correct
48 Correct 3 ms 848 KB correct
49 Correct 6 ms 848 KB correct
50 Correct 17 ms 1104 KB correct
51 Correct 47 ms 1488 KB correct
52 Correct 41 ms 1408 KB correct
53 Correct 38 ms 1360 KB correct
54 Correct 50 ms 1616 KB correct
55 Correct 47 ms 1304 KB correct
56 Correct 47 ms 1360 KB correct
57 Correct 47 ms 1652 KB correct
58 Correct 1 ms 336 KB correct
59 Correct 1 ms 336 KB correct
60 Execution timed out 3085 ms 4420 KB Time limit exceeded
61 Halted 0 ms 0 KB -