Submission #319749

#	Time	Username	Problem	Language	Result	Execution time	Memory
319749		NicolaAbusaad2014	Connecting Supertrees (IOI20_supertrees)	C++14	21 / 100	280 ms	22244 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
vector<long>parent;
std::vector<std::vector<int> > answer;
long find_set(long x)
{
    if(parent[x]==x){
        return x;
    }
    long z=find_set(parent[x]);
    parent[x]=z;
    return z;
}
void union_set(long x,long z)
{
    x=find_set(x);
    z=find_set(z);
    if(x!=z){
        parent[z]=x;
        answer[x][z]=1;
        answer[z][x]=1;
    }
}
int construct(std::vector<std::vector<int> > p) {
	int n = p.size();
	for(long i=0;i<n;i++){
        parent.push_back(i);
	}
	for (int i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		answer.push_back(row);
	}
	bool ok=true;
	for(long i=0;i<n;i++){
        for(long j=i+1;j<n;j++){
            if(p[i][j]==1){
                union_set(i,j);
            }
        }
	}
	for(long i=0;i<n;i++){
        for(long j=i+1;j<n;j++){
            if(p[i][j]==0){
                if(find_set(i)==find_set(j)){
                    ok=false;
                    i=n;
                    break;
                }
            }
        }
	}
	if(ok){
        build(answer);
        return 1;
	}
    return 0;
}

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