Submission #733488

#	Time	Username	Problem	Language	Result	Execution time	Memory
733488		tigar	Connecting Supertrees (IOI20_supertrees)	C++14	21 / 100	1107 ms	2097152 KiB

supertrees

#include <bits/stdc++.h>
#include "supertrees.h"

using namespace std;

typedef long long ll;
vector<int> jedan[1010], dva[1010];
bool check[1010];
int components[1010];
vector<int>lin, cc;
pair<int, int>comp[1010];

bool provera(int x, std::vector<std::vector<int>>p, int cmp)
{
    components[x]=cmp;
    lin.push_back(x);
    int n=p.size();
    for(int i=0; i<jedan[x].size(); i++)
    {
        if(check[jedan[x][i]])continue;
        check[jedan[x][i]]=true;
        components[jedan[x][i]]=cmp;
        for(int j=0; j<n; j++)
        {
            if(p[jedan[x][i]][j]!=p[x][j])return false;
        }
    }
    for(int i=0; i<dva[x].size(); i++)
    {
        if(check[dva[x][i]])continue;
        check[dva[x][i]]=true;
        components[dva[x][i]]=cmp;
        for(int j=0; j<n; j++)
        {
            if(p[dva[x][i]][j]!=0 and p[x][j]==0)return false;
            if(p[dva[x][i]][j]==0 and p[x][j]!=0)return false;
        }
        if(!provera(dva[x][i], p, cmp))return false;
    }
    return true;
}

int construct(std::vector<std::vector<int>>p)
{
    int n=p.size();
    for(int i=0; i<n; i++)
    {
        for(int j=0; j<n; j++)
        {
            if(p[i][j]==1)jedan[i].push_back(j);
            else if(p[i][j]==2)dva[i].push_back(j);
            else if(p[i][j]==3)return 0;
        }
    }
    for(int i=0; i<n; i++)
    {
        if(check[i])continue;
        comp[i]={-1, 0};
        cc.push_back(i);
        if(!provera(i, p, i))return 0;
    }

    vector<vector<int> > ans(n);
    for(int i=0; i<n; i++){ans[i].resize(n, 0);}
    for(int i=0; i<lin.size(); i++)
    {
        for(int j=1; j<jedan[lin[i]].size(); j++)
        {
            ans[jedan[lin[i]][j]][jedan[lin[i]][j-1]]=1;
            ans[jedan[lin[i]][j-1]][jedan[lin[i]][j]]=1;
        }
    }
    for(int i=0; i<lin.size(); i++)
    {
        int c=components[lin[i]];
        if(comp[c].first==-1)comp[c]={lin[i], lin[i]};
        else
        {
            ans[comp[c].second][lin[i]]=1;
            ans[lin[i]][comp[c].second]=1;
            comp[c].second=lin[i];
        }
    }
    for(int i=0; i<cc.size(); i++)
    {
        if(ans[comp[cc[i]].first][comp[cc[i]].second]==1)return 0;
        ans[comp[cc[i]].first][comp[cc[i]].second]=1;
        ans[comp[cc[i]].second][comp[cc[i]].first]=1;
    }
    for(int i=0; i<n; i++)
    {
        ans[i][i]=0;
    }
    build(ans);
    return 1;
}

/*int main()
{
    int n; cin>>n;
    vector<vector<int> >p;
    for(int i=0; i<n; i++)
    {
        vector<int>pp(n);
        for(int j=0; j<n; j++)
        {
            cin>>pp[j];
        }
        p.push_back(pp);
    }
    cout<<construct(p);
}*/

Compilation message (stderr)

supertrees.cpp: In function 'bool provera(int, std::vector<std::vector<int> >, int)':
supertrees.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for(int i=0; i<jedan[x].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~
supertrees.cpp:28:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i=0; i<dva[x].size(); i++)
      |                  ~^~~~~~~~~~~~~~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:65:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |     for(int i=0; i<lin.size(); i++)
      |                  ~^~~~~~~~~~~
supertrees.cpp:67:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |         for(int j=1; j<jedan[lin[i]].size(); j++)
      |                      ~^~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:73:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |     for(int i=0; i<lin.size(); i++)
      |                  ~^~~~~~~~~~~
supertrees.cpp:84:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |     for(int i=0; i<cc.size(); i++)
      |                  ~^~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 10 / 10
• Subtask 3: 0 / 19
• Subtask 4: 0 / 35
• Subtask 5: 0 / 21
• Subtask 6: 0 / 4