Submission #888217

#	Time	Username	Problem	Language	Result	Execution time	Memory
888217		12345678	Connecting Supertrees (IOI20_supertrees)	C++17	46 / 100	159 ms	22352 KiB

supertrees

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

using namespace std;

const int nx=1e3+5;
bool vs[nx];

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]==3) return 0;
	vector<vector<int>> answer(n, vector<int> (n, 0));
    vector<int> h;
	for (int i=0; i<n; i++)
    {
        if (vs[i]) continue;
        vector<int> d;
        for (int j=0; j<n; j++) if (p[i][j]==1) vs[j]=1, d.push_back(j);
        h.push_back(i);
        int sz=d.size();
        for (int j=0; j<sz-1; j++) answer[d[j]][d[j+1]]=answer[d[j+1]][d[j]]=1;
    }
    for (int i=0; i<n; i++) vs[i]=0;
    for (int i=0; i<h.size(); i++)
    {
        if (vs[i]) continue;
        vector<int> d;
        for (auto j:h) if (p[i][j]) d.push_back(j), vs[j]=1;
        if (d.size()==1) continue;
        int sz=d.size();
        for (int j=0; j<sz-1; j++) answer[d[j]][d[j+1]]=answer[d[j+1]][d[j]]=1;
        answer[d[0]][d[sz-1]]=answer[d[sz-1]][d[0]]=1;
    }
	build(answer);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for (int i=0; i<h.size(); i++)
      |                   ~^~~~~~~~~

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