Submission #733705

#	Time	Username	Problem	Language	Result	Execution time	Memory
733705		tigar	Connecting Supertrees (IOI20_supertrees)	C++14	21 / 100	953 ms	2097152 KiB

supertrees

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

using namespace std;

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

bool provera(int x, std::vector<std::vector<int>>p, int cmp)
{
    lin.push_back(x);
    cc[cmp].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;
        if(jedan[x].size()!=jedan[jedan[x][i]].size())return false;
        for(int j=0; j<jedan[x].size(); j++)
        {
            if(jedan[x][j]!=jedan[jedan[x][i]][j])return false;
        }
    }
    for(int i=0; i<dva[x].size(); i++)
    {
        if(check[dva[x][i]])continue;
        check[dva[x][i]]=true;
        if(nula[x].size()!=nula[dva[x][i]].size())return false;
        if(nula[x].size()<=n/2)
        {for(int j=0; j<nula[x].size(); j++)
        {
            if(nula[x][j]!=nula[dva[x][i]][j])return false;
        }}
        else
        {
            for(int j=0; j<jedan[x].size(); j++)
            {
                if(jedan[x][j]!=0 and jedan[dva[x][i]][j]==0)return false;
                if(jedan[x][j]==0 and jedan[dva[x][i]][j]!=0)return false;
            }
            for(int j=0; j<dva[x].size(); j++)
            {
                if(dva[x][j]!=0 and dva[dva[x][i]][j]==0)return false;
                if(dva[x][j]==0 and dva[dva[x][i]][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;
            else nula[i].push_back(j);
        }
    }
    int br=1;
    for(int i=0; i<n; i++)
    {
        if(check[i])continue;
        if(!provera(i, p, br))return 0;
        br++;
    }
    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=1; i<br; i++)
    {
        for(int j=0; j<cc[i].size(); j++)
        {
            //cout<<cc[i][j]<<" ";
            if(cc[i].size()==2)return 0;
            ans[cc[i][j]][cc[i][(j+1)%cc[i].size()]]=1;
            ans[cc[i][(j+1)%cc[i].size()]][cc[i][j]]=1;
        }
        //cout<<endl;
    }
    for(int i=0; i<n; i++)
    {
        ans[i][i]=0;
    }
    //for(int i=0; i<n; i++){for(int j=0; j<n; j++)cout<<ans[i][j]<<" "; cout<<endl;}
    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:17:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for(int i=0; i<jedan[x].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~
supertrees.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         for(int j=0; j<jedan[x].size(); j++)
      |                      ~^~~~~~~~~~~~~~~~
supertrees.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i=0; i<dva[x].size(); i++)
      |                  ~^~~~~~~~~~~~~~
supertrees.cpp:32:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |         if(nula[x].size()<=n/2)
      |            ~~~~~~~~~~~~~~^~~~~
supertrees.cpp:33:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         {for(int j=0; j<nula[x].size(); j++)
      |                       ~^~~~~~~~~~~~~~~
supertrees.cpp:39:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |             for(int j=0; j<jedan[x].size(); j++)
      |                          ~^~~~~~~~~~~~~~~~
supertrees.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             for(int j=0; j<dva[x].size(); j++)
      |                          ~^~~~~~~~~~~~~~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:77:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     for(int i=0; i<lin.size(); i++)
      |                  ~^~~~~~~~~~~
supertrees.cpp:79:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |         for(int j=1; j<jedan[lin[i]].size(); j++)
      |                      ~^~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:88:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |         for(int j=0; j<cc[i].size(); j++)
      |                      ~^~~~~~~~~~~~~

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