oj.uz

Submission #1034231

# Submission time Handle Problem Language Result Execution time Memory
1034231 2024-07-25T11:00:19 Z Gray Connecting Supertrees (IOI20_supertrees) C++17
0 / 100
 0 ms 428 KB 
#include "supertrees.h"
#include <map>
#include <vector>
 
using namespace std;
 
#define ll long long
#define ff first
#define ss second
#define ln "\n"
#define pll pair<ll, ll>
 
struct DSU{
	vector<int> p;
	int n, cnt;
	DSU(int N){
		n=N;
		cnt=n;
		p.resize(n, -1);
	}
	int get(int x){
		return p[x]==-1?x:p[x]=get(p[x]);
	}
	bool unite(int a, int b){
		a=get(a);
		b=get(b);
		if (a==b) return 0;
		cnt--;
		if (a<b) swap(a, b);
		p[a]=b;
		return 1;
	}
};
 
int construct(std::vector<std::vector<int>> p) {
	int n = (int)p.size();
	DSU tr(n), tr2(n);
	vector<vector<int>> A(n);
	for (int i=0; i<n; i++){
		for (int j=0; j<n; j++){
			if (i!=j and p[i][j]){
				tr.unite(i, j);
				if (p[i][j]==1) tr2.unite(i, j);
			}
		}
	}
	vector<vector<int>> ccs(tr.cnt);
	for (int i=0; i<n; i++){
		ccs[tr.get(i)].push_back(i);
	}
	vector<vector<int>> ans(n, vector<int>(n));
	for (int cc=0; cc<tr.cnt; cc++){
		map<int, vector<int>> groups;
		for (auto ch:ccs[cc]){
			groups[tr2.get(ch)].push_back(ch);
		}
		vector<int> circle;
		for (auto &[icc,mem]:groups){
			for (ll j=1; j<(int)mem.size(); j++){
				ans[mem[j]][mem[j-1]]=ans[mem[j-1]][mem[j]]=1;
			}
			circle.push_back(mem[0]);
		}
		for (ll j=0; j<(int)circle.size(); j++){
			int nxt = (j+1)%(int)(circle.size());
			ans[circle[j]][circle[nxt]]=ans[circle[nxt]][circle[j]]=1;
		}
	}
	build(ans);
	return 1;
}

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 428 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -