Submission #300210

#	Time	Username	Problem	Language	Result	Execution time	Memory
300210		fpc_coder	Connecting Supertrees (IOI20_supertrees)	C++17	0 / 100	1 ms	384 KiB

supertrees

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

using namespace std;

int construct(vector<vector<int>> p) {
    vector<vector<int>> b(p.size(), vector<int>(p.size(), 0));
    int n = (int) p.size();
    vector<int> par(n, -1);
    vector<bool> vis(n, false);
    bool subtask3 = false;
    for (int i = 0; i < n; i++) {
        if (vis[i]) continue;
        par[i] = i;
        int cur = i;
        for (int j = 0; j < n; j++) {
            if (i == j) continue;
            if (p[i][j]) {
                if (vis[j]) return 0;
                vis[j] = true;
                b[cur][j] = b[j][cur] = 1;
                par[j] = i;
                cur = j;
            }
        }
        if (b[i][cur]) return 0;
        b[i][cur] = b[cur][i] = 1;
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (i == j) continue;
            if (par[i] == par[j] && p[i][j] == 0) return 0;
            if (par[i] != par[j] && p[i][j] == 2) return 0;
        }
    }
    build(b);
    return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:11:10: warning: unused variable 'subtask3' [-Wunused-variable]
   11 |     bool subtask3 = false;
      |          ^~~~~~~~

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