Submission #417885

#	Time	Username	Problem	Language	Result	Execution time	Memory
417885		aris12345678	Connecting Supertrees (IOI20_supertrees)	C++14	0 / 100	1 ms	332 KiB

supertrees

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

const int mxN = 1005;
int par[mxN], depth[mxN];
vector<int> adj[mxN];

bool find(int x) {
    return x == par[x] ? x : par[x] = find(par[x]);
}

void unite(int x, int y) {
    x = find(x), y = find(y);
    if(depth[x] > depth[y])
        par[y] = x;
    else if(depth[x] < depth[y])
        par[x] = y;
    else
        par[y] = x, depth[x]++;
}

int construct(vector<vector<int> > p) {
    int n = p.size();
    for(int i = 0; i < n; i++)
        par[i] = i, depth[i] = 1;
    for(int i = 0; i < n-1; i++) {
        for(int j = i+1; j < n; j++) {
            if(p[i][j] == 1)
                unite(i, j);
        }
    }
    for(int i = 0; i < n; i++)
        adj[find(i)].push_back(i);
    for(int i = 0; i < n-1; i++) {
        for(int j = i+1; j < n; j++) {
            if(p[i][j] == 0 && find(i) == find(j))
                return 0;
        }
    }
    vector<vector<int> > b(n, vector<int>(n, 0));
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < (int) adj[i].size()-1; j++) {
            b[adj[i][j]][adj[i][j+1]] = 1;
            b[adj[i][j+1]][adj[i][j]] = 1;
        }
    }
    build(b);
    return 1;
}

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