Submission #771063

#	Time	Username	Problem	Language	Result	Execution time	Memory
771063		OrazB	Connecting Supertrees (IOI20_supertrees)	C++14	21 / 100	193 ms	29896 KiB

supertrees

#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;
#define N 100005
#define wr cout << "Continue debugging\n";
#define all(x) (x).begin(), (x).end()
#define ll long long int
#define pii pair <int, int>
#define pb push_back
#define ff first
#define ss second
 
vector<int> vec[N];
 
int construct(vector<vector<int>> p){
	int n = p.size();
	vector<vector<int>> b(n, vector<int>(n, 0));
	vector<int> vis(n, 0), ok(n, -1);
	int cnt = 0;
	for (int i = 0; i < n; i++){
		if (vis[i]){ 
			if (p[i] != vec[vis[i]]) return 0;
			continue;
		}
		vis[i] = ++cnt;
		vector<int> v;
		for (int j = 0; j < n; j++){
			if (p[i][j] and i != j){
				if (p[i][j] == 1){
					b[i][j] = b[j][i] = 1;
					vis[j] = cnt;
				}else v.pb(j);
			}
			vec[cnt].pb(p[i][j]);
		}
		if (!v.size()) continue;
		if (ok[i] != -1){
			for (int j = 0; j < n; j++){
				if (i != j and p[i][j] == 1){
					b[ok[i]][j] = b[j][ok[i]] = 0;
				}
			}
			continue;
		}
		b[i][v[0]] = b[v[0]][i] = 1;
		b[i][v.back()] = b[v.back()][i] = 1;
		ok[v[0]] = i;
		for (int j = 1; j < v.size(); j++){
			b[v[j-1]][v[j]] = b[v[j]][v[j-1]] = 1;
			ok[v[j]] = i;
		}
	}
	// for (int i = 0; i < n; i++){
	// 	for (int j = 0; j < n; j++) cout << b[i][j] << ' ';
	// 	cout << '\n';
	// }
	build(b);
	return 1;
}
// int main ()
// {
// 	int n;
// 	cin >> n;
// 	vector<vector<int>> p(n, vector<int>(n));
// 	for (int i = 0; i < n; i++){
// 		for (int j = 0; j < n; j++) cin >> p[i][j];
// 	}
// 	int x = construct(p);
// }	

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:48:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |   for (int j = 1; j < v.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