oj.uz

Submission #507450

# Submission time Handle Problem Language Result Execution time Memory
507450 2022-01-12T13:00:08 Z jamezzz Connecting Supertrees (IOI20_supertrees) C++17
56 / 100
 234 ms 22244 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

struct ufds{
	int par[1005],rnk[1005];
	void init(int n){
		for(int i=0;i<n;++i)par[i]=i,rnk[i]=0;
	}
	int fp(int i){return (par[i]==i)?i:par[i]=fp(par[i]);}
	void join(int x,int y){
		x=fp(x),y=fp(y);
		if(rnk[x]==rnk[y])par[x]=y;
		else par[y]=x;
		if(rnk[x]==rnk[y])++rnk[x];
	}
}u;

int construct(vector<vector<int>> p){
	int n=p.size();
	u.init(n);
	for(int i=0;i<n;++i){
		for(int j=0;j<n;++j){
			if(p[i][j]==3)return 0;
			if(p[i][j]!=p[j][i])return 0;
			if(p[i][j]!=0)u.join(i,j);
		}
	}
	vector<vector<int>> c1;
	c1.resize(n);
	for(int i=0;i<n;++i){
		c1[u.fp(i)].push_back(i);
		for(int j=0;j<n;++j){
			if(u.fp(i)==u.fp(j)&&p[i][j]==0){
				return 0;
			}
		}
	}

	u.init(n);
	for(int i=0;i<n;++i){
		for(int j=0;j<n;++j){
			if(p[i][j]==1)u.join(i,j);
		}
	}
	vector<vector<int>> c2,c3;
	c2.resize(n);
	c3.resize(n);
	for(int i=0;i<n;++i){
		c2[u.fp(i)].push_back(i);
		for(int j=0;j<n;++j){
			if(u.fp(i)==u.fp(j)&&p[i][j]!=1){
				return 0;
			}
		}
		for(int j:c1[i]){
			if(u.fp(j)==j)c3[i].push_back(j);
		}
	}
	
	vector<vector<int>> answer;
	answer.resize(n);
	for(int i=0;i<n;i++)answer[i].resize(n);
	for(int i=0;i<n;++i){
		for(int j:c2[i]){
			if(i!=j)answer[i][j]=answer[j][i]=1;
		}
	}
	for(int i=0;i<n;++i){
		if(c3[i].size()>=2){
			int m=c3[i].size();
			for(int j=0;j<m;++j){
				int a=c3[i][j],b=c3[i][(j+1)%m];
				if(a!=b)answer[a][b]=answer[b][a]=1;
			}
		}
	}
	build(answer);
	return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1156 KB Output is correct
7 Correct 178 ms 22028 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1156 KB Output is correct
7 Correct 178 ms 22028 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1228 KB Output is correct
13 Correct 171 ms 22180 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 3 ms 588 KB Output is correct
17 Correct 79 ms 8188 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 46 ms 5804 KB Output is correct
21 Correct 176 ms 22060 KB Output is correct
22 Correct 221 ms 22084 KB Output is correct
23 Correct 200 ms 22036 KB Output is correct
24 Correct 176 ms 22084 KB Output is correct
25 Correct 70 ms 8204 KB Output is correct
26 Correct 67 ms 8192 KB Output is correct
27 Correct 204 ms 22024 KB Output is correct
28 Correct 181 ms 22244 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Incorrect 1 ms 204 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 44 ms 5704 KB Output is correct
5 Correct 196 ms 22132 KB Output is correct
6 Correct 190 ms 22080 KB Output is correct
7 Correct 234 ms 22028 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 46 ms 5760 KB Output is correct
10 Correct 197 ms 22160 KB Output is correct
11 Correct 179 ms 22160 KB Output is correct
12 Correct 209 ms 22152 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 66 ms 5796 KB Output is correct
17 Correct 198 ms 22152 KB Output is correct
18 Correct 186 ms 22068 KB Output is correct
19 Correct 207 ms 22140 KB Output is correct
20 Correct 198 ms 22084 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1156 KB Output is correct
7 Correct 178 ms 22028 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1228 KB Output is correct
13 Correct 171 ms 22180 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 3 ms 588 KB Output is correct
17 Correct 79 ms 8188 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 46 ms 5804 KB Output is correct
21 Correct 176 ms 22060 KB Output is correct
22 Correct 221 ms 22084 KB Output is correct
23 Correct 200 ms 22036 KB Output is correct
24 Correct 176 ms 22084 KB Output is correct
25 Correct 70 ms 8204 KB Output is correct
26 Correct 67 ms 8192 KB Output is correct
27 Correct 204 ms 22024 KB Output is correct
28 Correct 181 ms 22244 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Incorrect 1 ms 204 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 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1156 KB Output is correct
7 Correct 178 ms 22028 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1228 KB Output is correct
13 Correct 171 ms 22180 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 3 ms 588 KB Output is correct
17 Correct 79 ms 8188 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 46 ms 5804 KB Output is correct
21 Correct 176 ms 22060 KB Output is correct
22 Correct 221 ms 22084 KB Output is correct
23 Correct 200 ms 22036 KB Output is correct
24 Correct 176 ms 22084 KB Output is correct
25 Correct 70 ms 8204 KB Output is correct
26 Correct 67 ms 8192 KB Output is correct
27 Correct 204 ms 22024 KB Output is correct
28 Correct 181 ms 22244 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Incorrect 1 ms 204 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -