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Submission #1078813

# Submission time Handle Problem Language Result Execution time Memory
1078813 2024-08-28T06:31:23 Z Faisal_Saqib Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 177 ms 32020 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
const int N=1e3;
int reach[N][N],tree_case[N][N];
int par[N],par1[N];
void init(int n)
{
	for(int i=0;i<n;i++)
		par[i]=par1[i]=i;
}
int get(int x)
{
	if(par[x]==x)return x;
	return par[x]=get(par[x]);
}
int get1(int x)
{
	if(par1[x]==x)return x;
	return par1[x]=get1(par1[x]);
}
bool merge(int x,int y)
{
	x=get(x);
	y=get(y);
	if(x==y)return 0;
	par[y]=x;
	return 1;
}
bool merge1(int x,int y)
{
	x=get1(x);
	y=get1(y);
	if(x==y)return 0;
	par1[y]=x;
	return 1;
}
vector<int> ma[N];
int head;
void dfs(int x)
{
	reach[head][x]=1;
	for(auto y:ma[x])
		if(!reach[head][y])
			dfs(y);
}
int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	init(n);
	for(int i=0;i<n;i++)
	{
		if(p[i][i]!=1) // i i is always one
			return 0;
		for(int j=0;j<n;j++)
			tree_case[i][j]=reach[i][j]=0;
	}
	for(int i=0;i<n;i++)
	{
		for(int j=i+1;j<n;j++)
		{
			if(p[i][j]==1)
			{
				tree_case[i][j]=tree_case[j][i]=merge1(i,j);
			}
		}
	}
	for(int i=0;i<n;i++)
	{
		if(i==get(i))
		{
			vector<int> cur={i};
			for(int j=i+1;j<n;j++)
			{
				if(get(j)==j)
				{
					bool han=1;
					for(auto k:cur)
					{
						if(p[k][j]!=2)
						{
							han=0;
							break;
						}
					}
					if(han)
					{
						cur.push_back(j);
						merge(i,j);
					}
				}
			}
			if(cur.size()==1)continue;
			if(cur.size()==2)
				return 0;
			cur.push_back(i);
			for(int j=1;j<cur.size();j++)
			{
				int x=cur[j-1];
				int y=cur[j];
				tree_case[x][y]=tree_case[y][x]=1;
				merge(x,y);
			}
		}
	}
	for(int i=0;i<n;i++)
	{
		for(int j=i+1;j<n;j++)
		{	
			if(tree_case[i][j])
			{
				ma[i].push_back(j);
				ma[j].push_back(i);
			}
		}
	}
	vector<vector<int>> answer(n,vector<int>(n,0));
	for(int i=0;i<n;i++)
	{
		for(int j=0;j<n;j++)
		{
			answer[i][j]=tree_case[i][j];
			reach[i][j]=0;
		}
		head=i;
		dfs(i);
		for(int j=0;j<n;j++)
		{
			p[i][j]-=(p[i][j]==2);// make 2 to 1
			if(reach[i][j]!=p[i][j])
			{
				return 0;
			}
		}
	}
	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:96:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |    for(int j=1;j<cur.size();j++)
      |                ~^~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 2908 KB Output is correct
7 Correct 123 ms 31900 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 2908 KB Output is correct
7 Correct 123 ms 31900 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 3012 KB Output is correct
13 Correct 119 ms 31908 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 3 ms 2396 KB Output is correct
17 Correct 65 ms 21928 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 32 ms 10268 KB Output is correct
21 Correct 118 ms 32000 KB Output is correct
22 Correct 138 ms 31828 KB Output is correct
23 Correct 133 ms 31312 KB Output is correct
24 Correct 120 ms 31828 KB Output is correct
25 Correct 74 ms 22096 KB Output is correct
26 Correct 54 ms 21928 KB Output is correct
27 Correct 126 ms 31784 KB Output is correct
28 Correct 121 ms 31828 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 6 ms 2908 KB Output is correct
9 Correct 139 ms 31952 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 2908 KB Output is correct
13 Correct 124 ms 31876 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 2436 KB Output is correct
17 Correct 66 ms 18004 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 31 ms 10196 KB Output is correct
22 Correct 121 ms 31828 KB Output is correct
23 Correct 117 ms 31928 KB Output is correct
24 Correct 177 ms 32020 KB Output is correct
25 Correct 52 ms 18000 KB Output is correct
26 Correct 57 ms 22096 KB Output is correct
27 Correct 126 ms 32020 KB Output is correct
28 Correct 131 ms 31896 KB Output is correct
29 Correct 53 ms 17960 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 32 ms 10196 KB Output is correct
5 Correct 127 ms 31908 KB Output is correct
6 Correct 129 ms 31828 KB Output is correct
7 Correct 127 ms 31828 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 46 ms 10244 KB Output is correct
10 Correct 127 ms 31780 KB Output is correct
11 Correct 133 ms 31892 KB Output is correct
12 Correct 130 ms 31852 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 440 KB Output is correct
16 Incorrect 14 ms 6748 KB Answer gives possible 0 while actual possible 1
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 2908 KB Output is correct
7 Correct 123 ms 31900 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 3012 KB Output is correct
13 Correct 119 ms 31908 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 3 ms 2396 KB Output is correct
17 Correct 65 ms 21928 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 32 ms 10268 KB Output is correct
21 Correct 118 ms 32000 KB Output is correct
22 Correct 138 ms 31828 KB Output is correct
23 Correct 133 ms 31312 KB Output is correct
24 Correct 120 ms 31828 KB Output is correct
25 Correct 74 ms 22096 KB Output is correct
26 Correct 54 ms 21928 KB Output is correct
27 Correct 126 ms 31784 KB Output is correct
28 Correct 121 ms 31828 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 6 ms 2908 KB Output is correct
37 Correct 139 ms 31952 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 7 ms 2908 KB Output is correct
41 Correct 124 ms 31876 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 5 ms 2436 KB Output is correct
45 Correct 66 ms 18004 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 31 ms 10196 KB Output is correct
50 Correct 121 ms 31828 KB Output is correct
51 Correct 117 ms 31928 KB Output is correct
52 Correct 177 ms 32020 KB Output is correct
53 Correct 52 ms 18000 KB Output is correct
54 Correct 57 ms 22096 KB Output is correct
55 Correct 126 ms 32020 KB Output is correct
56 Correct 131 ms 31896 KB Output is correct
57 Correct 53 ms 17960 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 3 ms 2396 KB Output is correct
61 Correct 60 ms 18092 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 1 ms 348 KB Output is correct
65 Incorrect 13 ms 6824 KB Answer gives possible 0 while actual possible 1
66 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 2908 KB Output is correct
7 Correct 123 ms 31900 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 3012 KB Output is correct
13 Correct 119 ms 31908 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 3 ms 2396 KB Output is correct
17 Correct 65 ms 21928 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 32 ms 10268 KB Output is correct
21 Correct 118 ms 32000 KB Output is correct
22 Correct 138 ms 31828 KB Output is correct
23 Correct 133 ms 31312 KB Output is correct
24 Correct 120 ms 31828 KB Output is correct
25 Correct 74 ms 22096 KB Output is correct
26 Correct 54 ms 21928 KB Output is correct
27 Correct 126 ms 31784 KB Output is correct
28 Correct 121 ms 31828 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 6 ms 2908 KB Output is correct
37 Correct 139 ms 31952 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 7 ms 2908 KB Output is correct
41 Correct 124 ms 31876 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 5 ms 2436 KB Output is correct
45 Correct 66 ms 18004 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 31 ms 10196 KB Output is correct
50 Correct 121 ms 31828 KB Output is correct
51 Correct 117 ms 31928 KB Output is correct
52 Correct 177 ms 32020 KB Output is correct
53 Correct 52 ms 18000 KB Output is correct
54 Correct 57 ms 22096 KB Output is correct
55 Correct 126 ms 32020 KB Output is correct
56 Correct 131 ms 31896 KB Output is correct
57 Correct 53 ms 17960 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 32 ms 10196 KB Output is correct
62 Correct 127 ms 31908 KB Output is correct
63 Correct 129 ms 31828 KB Output is correct
64 Correct 127 ms 31828 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 46 ms 10244 KB Output is correct
67 Correct 127 ms 31780 KB Output is correct
68 Correct 133 ms 31892 KB Output is correct
69 Correct 130 ms 31852 KB Output is correct
70 Correct 1 ms 344 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 1 ms 440 KB Output is correct
73 Incorrect 14 ms 6748 KB Answer gives possible 0 while actual possible 1
74 Halted 0 ms 0 KB -