제출 #1046556

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1046556		sofijavelkovska	슈퍼트리 잇기 (IOI20_supertrees)	C++17	100 / 100	126 ms	22612 KiB

supertrees

#include "supertrees.h"
//#include "grader.cpp"

#include <bits/stdc++.h>
using namespace std;

int construct(vector<vector<int> > adj)
{
	int n=adj.size();
	vector<vector<int> > answer;
	for (int i=0; i<n; i++)
    {
        vector<int> row;
        row.resize(n, 0);
        answer.push_back(row);
    }
    for (int i=0; i<n; i++)
        for (int j=i+1; j<n; j++)
            if (adj[i][j]==3)
                return 0;
	int visited[n]={0};
	queue<int> q;
	vector<int> component;
	vector<vector<int> > subcomponents;
	for (int i=0; i<n; i++)
    {
        if (visited[i])
            continue;
        visited[i]=1;
        q.push(i);
        component.clear();
        while (!q.empty())
        {
            int x=q.front();
            q.pop();
            component.push_back(x);
            for (int j=0; j<n; j++)
                if (adj[x][j]>0 && !visited[j])
                {
                    visited[j]=1;
                    q.push(j);
                }
        }
        subcomponents.clear();
        for (auto x : component)
        {
            if (visited[x]==2)
                continue;
            visited[x]=2;
            q.push(x);
            vector<int> newcomp;
            subcomponents.push_back(newcomp);
            while (!q.empty())
            {
                int y=q.front();
                q.pop();
                subcomponents.back().push_back(y);
                for (auto z : component)
                    if (y!=z && adj[y][z]==1 && visited[z]!=2)
                    {
                        visited[z]=2;
                        q.push(z);
                    }
            }
        }
        /*for (auto c : subcomponents)
        {
            cout << "subc ";
            for (auto x : c)
                cout << x << ' ';
            cout << '\n';
        }
        cout << "end\n";*/
        for (int j=0; j<subcomponents.size(); j++)
        {
            for (int t=0; t<subcomponents[j].size(); t++)
                for (int k=t+1; k<subcomponents[j].size(); k++)
                    if (adj[subcomponents[j][t]][subcomponents[j][k]]!=1)
                        return 0;
            for (auto x : subcomponents[j])
                for (int t=0; t<subcomponents.size(); t++)
                {
                    if (t==j)
                        continue;
                    for (auto y : subcomponents[t])
                        if (adj[x][y]!=2)
                            return 0;
                }
        }
        if (subcomponents.size()==2)
        {
            for (int j=0; j<component.size(); j++)
                for (int t=j+1; t<component.size(); t++)
                    if (adj[j][t]!=1)
                        return 0;
        }
        for (int j=0; j<subcomponents.size(); j++)
            for (int t=0; t<subcomponents[j].size()-1; t++)
            {
                int x=subcomponents[j][t];
                int y=subcomponents[j][t+1];
                answer[x][y]=1;
                answer[y][x]=1;
            }
        if (subcomponents.size()==1)
            continue;
        if (subcomponents.size()==2)
        {
            int x=subcomponents[0][0];
            int y=subcomponents[1][0];
            answer[x][y]=1;
            answer[y][x]=1;
        }
        for (int j=0; j<subcomponents.size(); j++)
        {
            int x=subcomponents[j][0];
            int y=subcomponents[(j+1)%subcomponents.size()][0];
            answer[x][y]=1;
            answer[y][x]=1;
        }
    }
	build(answer);

	return 1;
}

컴파일 시 표준 에러 (stderr) 메시지

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:17:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   17 |     for (int i=0; i<n; i++)
      |     ^~~
supertrees.cpp:21:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   21 |  int visited[n]={0};
      |  ^~~
supertrees.cpp:74:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |         for (int j=0; j<subcomponents.size(); j++)
      |                       ~^~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:76:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |             for (int t=0; t<subcomponents[j].size(); t++)
      |                           ~^~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:77:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |                 for (int k=t+1; k<subcomponents[j].size(); k++)
      |                                 ~^~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:81:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |                 for (int t=0; t<subcomponents.size(); t++)
      |                               ~^~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:92:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |             for (int j=0; j<component.size(); j++)
      |                           ~^~~~~~~~~~~~~~~~~
supertrees.cpp:93:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |                 for (int t=j+1; t<component.size(); t++)
      |                                 ~^~~~~~~~~~~~~~~~~
supertrees.cpp:97:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |         for (int j=0; j<subcomponents.size(); j++)
      |                       ~^~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:98:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |             for (int t=0; t<subcomponents[j].size()-1; t++)
      |                           ~^~~~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:114:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  114 |         for (int j=0; j<subcomponents.size(); j++)
      |                       ~^~~~~~~~~~~~~~~~~~~~~

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