oj.uz

Submission #300277

# Submission time Handle Problem Language Result Execution time Memory
300277 2020-09-17T03:52:53 Z easrui Connecting Supertrees (IOI20_supertrees) C++17
19 / 100
 269 ms 22264 KB 
#include "supertrees.h"

#include <bits/stdc++.h>
#define va first
#define vb second
#define all(x) (x).begin(), (x).end()
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<pii,int> ppi;
typedef pair<int,pii> pip;

const int MN = 1e3+5;
const int MOD = 1e9+7;
const int INF = 1e9;

int par[MN];
vector<int> G[MN],L[MN],C;

int fnd(int u)
{
	return u==par[u] ? u : par[u]=fnd(par[u]);
}

void join(int u, int v)
{
	u = fnd(u), v = fnd(v);
	par[u] = v;
}

int construct(vector<vector<int>> p) {
    int n = p.size();
	for(int i=0; i<n; i++) par[i] = i;

	vector<vector<int>> ans;
	vector<int> v(n);
	for(int i=0; i<n; i++) ans.push_back(v);

	for(int i=0; i<n; i++)
		for(int j=0; j<n; j++)
			if(p[i][j]) join(i,j);

	for(int i=0; i<n; i++)
		for(int j=0; j<n; j++)
			if(fnd(i)==fnd(j)&&!p[i][j]) return 0;

	for(int i=0; i<n; i++) G[par[i]].push_back(i);

	for(int i=0; i<n; i++) par[i] = i;

	for(int t=0; t<n; t++){
		//FOR G[i]
		for(int i=0; i<n; i++) L[i].clear();
		C.clear();

		int nn = G[t].size();
		for(int i:G[t])
			for(int j:G[t])
				if(p[i][j]==1) join(i,j);

		for(int i:G[t])
			for(int j:G[t])
				if(fnd(i)==fnd(j)&&p[i][j]==2) return 0;

		for(int i:G[t]) if(par[i]==i){
			L[i].push_back(i);
			C.push_back(i);
		}
		for(int i:G[t]) if(par[i]!=i) L[par[i]].push_back(i);

		for(int i:G[t]){
			if(par[i]!=i) continue;
			for(int j=0; j<L[i].size()-1; j++){
				ans[L[i][j]][L[i][j+1]] = 1;
				ans[L[i][j+1]][L[i][j]] = 1;
			}
		}
		int c = C.size();
		if(nn>1&&c<3) return 0;

		for(int i=0; i<c; i++){
			ans[C[i]][C[(i+1)%c]] = 1;
			ans[C[(i+1)%c]][C[i]] = 1;
		}
	}
	
	for(int i=0; i<n; i++) ans[i][i] = 0;

	/*for(int i=0; i<n; i++){
		for(int j=0; j<n; j++){
			cout << ans[i][j] << ' ';
		}
		cout << '\n';
	}*/
	build(ans);
	return 1;
}

/*int main()
{
	#ifdef L0TUS
    freopen("C:\\Users\\SKYPC364\\Documents\\Coding\\BOJ\\input.txt", "r", stdin);
    freopen("C:\\Users\\SKYPC364\\Documents\\Coding\\BOJ\\output.txt", "w", stdout);
	#endif
	int n;
	cin >> n;
	vector<vector<int>> p(n);
	for(int i=0; i<n; i++)
		for(int j=0; j<n; j++){
			int x;
			cin >> x;
			p[i].push_back(x);
		}
	construct(p);
}*/

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:73:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |    for(int j=0; j<L[i].size()-1; j++){
      |                 ~^~~~~~~~~~~~~~

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 10 ms 1280 KB Output is correct
9 Correct 241 ms 22264 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 11 ms 1280 KB Output is correct
13 Correct 265 ms 22136 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 5 ms 896 KB Output is correct
17 Correct 121 ms 12152 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 62 ms 5880 KB Output is correct
22 Correct 247 ms 22136 KB Output is correct
23 Correct 243 ms 22140 KB Output is correct
24 Correct 264 ms 22136 KB Output is correct
25 Correct 100 ms 12280 KB Output is correct
26 Correct 101 ms 12152 KB Output is correct
27 Correct 245 ms 22140 KB Output is correct
28 Correct 269 ms 22136 KB Output is correct
29 Correct 100 ms 12280 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -