Submission #424570

#	Time	Username	Problem	Language	Result	Execution time	Memory
424570		berrygarlic	Connecting Supertrees (IOI20_supertrees)	C++14	0 / 100	0 ms	204 KiB

supertrees

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

int construct(vector<vector<int> > p){
	int n = p.size();
	vector<vector<int> > b(n,vector<int>(n));
	bool vis[n];
	memset(vis,false,sizeof(vis));
	for(int i=0;i<n;i++){
		if(vis[i]) continue;
		vector<int> line;
		for(int j=0;j<n;j++){
			if(p[i][j] == 1){
				line.push_back(j);
			}
		}
		for(int j=0;j<line.size();j++){
			if(vis[line[j]]){
				return 0;
			}
			vis[line[j]] = true;
			for(int k=0;k<line.size();k++){
				if(p[line[j]][line[k]] != 1){
					return 0;
				}
			}
		}
		for(int j=1;j<line.size();j++){
			b[line[j]][line[j-1]] = b[line[j-1]][line[j]] = true;
		}
	}
	vector<vector<int> > t = b;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			for(int k=0;k<n;k++){
				if(t[j][i] && t[i][k]){
					t[j][k] = t[k][j] = true;
				}
			}
		}
	}
	if(t != p) return 0;
	build(b);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:18:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   for(int j=0;j<line.size();j++){
      |               ~^~~~~~~~~~~~
supertrees.cpp:23:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |    for(int k=0;k<line.size();k++){
      |                ~^~~~~~~~~~~~
supertrees.cpp:29:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   for(int j=1;j<line.size();j++){
      |               ~^~~~~~~~~~~~

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