oj.uz

Submission #600129

# Submission time Handle Problem Language Result Execution time Memory
600129 2022-07-20T13:27:17 Z definitelynotmee Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 210 ms 22116 KB 
#include "supertrees.h"
#include<bits/stdc++.h>
#define ff first
#define ss second
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
template<typename T>
using matrix= vector<vector<T>>;

struct UnionFind{
	vector<int> pai;
	matrix<int> group;

	int n;
	UnionFind(int sz = 0){
		n = sz;
		pai = vector<int>(n);
		iota(all(pai),0);
		group = matrix<int>(n);
		for(int i = 0; i < n; i++)
			group[i].push_back(i);
	}
	int find(int id){
		if(pai[id] == id)
			return id;
		return pai[id] = find(pai[id]);
	}
	void onion(int a, int b){
		a = find(a);
		b = find(b);
		if(a == b)
			return;
		if(group[a].size() > group[b].size())
			swap(a,b);
		for(int i : group[a])
			group[b].push_back(i);
		group[a].clear();
		pai[a] = b;
	}
};

int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	matrix<int> resp(n,vector<int>(n));

	UnionFind connected(n);

	for (int i = 0; i < n; i++) {
		for(int j = 0; j < n; j++){
			if(p[i][j])
				connected.onion(i,j);
		}
	}
	auto solveforgroup =[&](vector<int>& g){
		vector<int> incall(n);
		for(int i : g)
			incall[i] = 1;
			
		int line = 1;
		for(int i : g){
			for(int j : g){
				if(!p[i][j])
					return 0;
				line&=p[i][j];
			}
		}
		if(line){
			for(int i = 1; i < g.size(); i++){
				resp[g[i-1]][g[i]] = 1;
				resp[g[i]][g[i-1]] = 1;
			}
			return 1;
		}

		vector<int> count1(n);

		for(int i : g){
			for(int j : g){
				count1[i]+=p[i][j] == 1;
			}
		}

		vector<int> cycle, incycle(n);

		for(int i : g){
			if(count1[i] == 0)
				cycle.push_back(i), incycle[i] = 0;
			for(int j : g){
				if(p[i][j] == 1 && count1[i] > count1[j]){
					cycle.push_back(i);
					incycle[i] = 1;
					break;
				}
			}
		}
		UnionFind lines(n);

		for(int i : g){
			if(incycle[i])
				continue;
			for(int j : g){
				if(p[i][j] == 1 && !incycle[j]){

				}
			}
		}



		return 1;
	};
	bool ok = 1;
	for(vector<int>& i : connected.group){
		if(i.size())
			ok&=solveforgroup(i);
	}
	if(!ok)
		return 0;
	build(resp);

	return 1;
}

Compilation message

supertrees.cpp: In lambda function:
supertrees.cpp:71:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |    for(int i = 1; i < g.size(); i++){
      |                   ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 8 ms 1108 KB Output is correct
7 Correct 191 ms 22016 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 8 ms 1108 KB Output is correct
7 Correct 191 ms 22016 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1176 KB Output is correct
13 Correct 169 ms 22068 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 92 ms 12168 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 44 ms 5796 KB Output is correct
21 Correct 173 ms 22092 KB Output is correct
22 Correct 175 ms 22032 KB Output is correct
23 Correct 202 ms 22016 KB Output is correct
24 Correct 174 ms 22092 KB Output is correct
25 Correct 73 ms 12196 KB Output is correct
26 Correct 86 ms 12176 KB Output is correct
27 Correct 210 ms 22116 KB Output is correct
28 Correct 168 ms 22016 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Too few ways to get from 0 to 1, should be 2 found 0
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 8 ms 1108 KB Output is correct
7 Correct 191 ms 22016 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1176 KB Output is correct
13 Correct 169 ms 22068 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 92 ms 12168 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 44 ms 5796 KB Output is correct
21 Correct 173 ms 22092 KB Output is correct
22 Correct 175 ms 22032 KB Output is correct
23 Correct 202 ms 22016 KB Output is correct
24 Correct 174 ms 22092 KB Output is correct
25 Correct 73 ms 12196 KB Output is correct
26 Correct 86 ms 12176 KB Output is correct
27 Correct 210 ms 22116 KB Output is correct
28 Correct 168 ms 22016 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 8 ms 1108 KB Output is correct
7 Correct 191 ms 22016 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1176 KB Output is correct
13 Correct 169 ms 22068 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 92 ms 12168 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 44 ms 5796 KB Output is correct
21 Correct 173 ms 22092 KB Output is correct
22 Correct 175 ms 22032 KB Output is correct
23 Correct 202 ms 22016 KB Output is correct
24 Correct 174 ms 22092 KB Output is correct
25 Correct 73 ms 12196 KB Output is correct
26 Correct 86 ms 12176 KB Output is correct
27 Correct 210 ms 22116 KB Output is correct
28 Correct 168 ms 22016 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -