Submission #1087035

#	Time	Username	Problem	Language	Result	Execution time	Memory
1087035		SulA	Connecting Supertrees (IOI20_supertrees)	C++17	11 / 100	128 ms	32292 KiB

supertrees

#include "supertrees.h"
#include <iostream>
#include <vector>

using namespace std;

vector<int> adj[1000], comp;
bool visited[1000];

void dfs(int u) {
    comp.push_back(u);
    visited[u] = -true;
    for (int v: adj[u]) if (!visited[v]) {
        dfs(v);
    }
}

int construct(vector<vector<int>> p) {
	int n = p.size(), mx = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            mx = max(mx, p[i][j]);
            if (p[i][j] != 0) {
                adj[i].push_back(j);
                adj[j].push_back(i);
            }
        }
    }
    vector<vector<int>> adj(n, vector<int>(n, 0));
    for (int i = 0; i < n; i++) if (!visited[i]) {
        comp.clear();
        dfs(i);
        for (int j = 0; j < comp.size() - 1; j++) {
            adj[ comp[j] ][ comp[j+1] ] = adj[ comp[j+1] ][ comp[j] ] = 1;
        }
        if (mx == 2) {
            if (comp.size() < 3) return 0;
            adj[comp.front()][comp.back()] = adj[comp.back()][comp.front()] = 1;
        }
    }
    build(adj);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:33:27: 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 < comp.size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~~~~

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