oj.uz

Submission #867808

# Submission time Handle Problem Language Result Execution time Memory
867808 2023-10-29T13:49:44 Z Ninedesu Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 1000 ms 1665036 KB 
#include "supertrees.h"
#include<bits/stdc++.h>
using namespace std;

const int N=1001;
int pa1[N],pa2[N],compo1[N],compo2[N];
bool vis1[N],vis2[N],way[N];
vector<int>adj[N],adj1[N],adj2[N],root1,root2;

int dsu1(int x){
	if(pa1[x]==x)return x;
	else return pa1[x]=dsu1(pa1[x]);
}

int dsu2(int x){
    if(pa2[x]==x)return x;
    else return pa2[x]=dsu2(pa2[x]);
}

void dfs(int u,int p){
    way[u]++;
    if(way[u]>1)return ;
    for(int v:adj[u]){
        if(v!=p)dfs(v,u);
    }
}

int construct(vector<vector<int>> p) {
	int n=p.size();
	vector<vector<int>> answer;
	for (int i = 0; i < n; i++) {
		vector<int> row;
		row.resize(n);
		answer.push_back(row);
		pa1[i]=i;
		pa2[i]=i;
	}
	for(int i=0; i<n; i++){
		for(int j=i+1; j<n; j++){
			if(p[i][j]==3)return 0;
			if(p[i][j]==1)pa1[dsu1(j)]=dsu1(i);
		}
	}
    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++){
            if(i!=j&&dsu1(i)==dsu1(j)){
                if(p[i][j]==0||p[i][j]==2)return 0;
                adj1[i].push_back(j);
                adj1[j].push_back(i);
            }
        }
    }
    for(int i=0; i<n; i++){
        if(vis1[i])continue;
        root1.push_back(i);
        compo1[i]=i;
        for(int j:adj1[i]){
            compo1[j]=i;
            vis1[j]=true;
            answer[i][j]=1;
            answer[j][i]=1;
        }
    }
    for(int i=0; i<root1.size(); i++){
        for(int j=i+1; j<root1.size(); j++){
            int a=root1[i],b=root1[j];
            if(p[a][b]==2)pa2[dsu2(a)]=dsu2(b);
        }
    }
    for(int i:root1){
        for(int j:root1){
            if(i!=j&&dsu2(i)==dsu2(j)){
                if(p[i][j]==0||p[i][j]==1)return 0;
                adj2[i].push_back(j);
                adj2[j].push_back(i);
            }
        }
    }
    for(int i:root1){
        if(vis2[i])continue;
        root2.push_back(i);
        compo2[i]=i;
        for(int j:adj2[i]){
            compo2[j]=i;
            vis2[j]=true;
        }
    }
    for(int i=0; i<n; i++){
        for(int j:root2){
            if(compo1[i]==compo1[j])compo2[i]=j;
        }
    }
    for(int i:root2){
        for(int j=1; j<adj2[i].size(); j++){
            answer[adj2[i][j]][adj2[i][j-1]]=1;
            answer[adj2[i][j-1]][adj2[i][j]]=1;
        }
		if(adj2[i].empty())continue;
        answer[adj2[i][0]][i]=1;
        answer[i][adj2[i][0]]=1;
        answer[adj2[i][adj2[i].size()-1]][i]=1;
        answer[i][adj2[i][adj2[i].size()-1]]=1;
    }
    for(int i=0; i<n; i++){
        for(int j=i+1; j<n; j++){
            if(answer[i][j]){
                adj[i].push_back(j);
                adj[j].push_back(i);
            }
        }
    }
    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++)way[j]=0;
        dfs(i,-1);
        for(int j=0; j<n; j++)if(way[j]!=p[i][j])return 0;
    }

	build(answer);
	return 1;
}

/*
6
1 2 2 0 0 1
2 1 2 1 0 0
2 2 2 0 1 0
0 1 0 1 2 2
0 0 1 2 1 2
1 0 0 2 2 1
*/

Compilation message

supertrees.cpp: In function 'void dfs(int, int)':
supertrees.cpp:21:10: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated]
   21 |     way[u]++;
      |     ~~~~~^
supertrees.cpp:22:14: warning: comparison of constant '1' with boolean expression is always false [-Wbool-compare]
   22 |     if(way[u]>1)return ;
      |        ~~~~~~^~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for(int i=0; i<root1.size(); i++){
      |                  ~^~~~~~~~~~~~~
supertrees.cpp:65:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for(int j=i+1; j<root1.size(); j++){
      |                        ~^~~~~~~~~~~~~
supertrees.cpp:94:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |         for(int j=1; j<adj2[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1628 KB Output is correct
7 Correct 166 ms 30288 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1628 KB Output is correct
7 Correct 166 ms 30288 KB Output is correct
8 Correct 0 ms 348 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 7 ms 1372 KB Output is correct
13 Correct 159 ms 22116 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 70 ms 12116 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 39 ms 5980 KB Output is correct
21 Correct 155 ms 23120 KB Output is correct
22 Correct 157 ms 22352 KB Output is correct
23 Correct 175 ms 26204 KB Output is correct
24 Correct 166 ms 22352 KB Output is correct
25 Correct 57 ms 12372 KB Output is correct
26 Correct 57 ms 12112 KB Output is correct
27 Correct 174 ms 28240 KB Output is correct
28 Correct 158 ms 22096 KB Output is correct

Subtask #3
0 / 19.0

# 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 Execution timed out 1178 ms 1580576 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Execution timed out 1176 ms 1665036 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1628 KB Output is correct
7 Correct 166 ms 30288 KB Output is correct
8 Correct 0 ms 348 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 7 ms 1372 KB Output is correct
13 Correct 159 ms 22116 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 70 ms 12116 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 39 ms 5980 KB Output is correct
21 Correct 155 ms 23120 KB Output is correct
22 Correct 157 ms 22352 KB Output is correct
23 Correct 175 ms 26204 KB Output is correct
24 Correct 166 ms 22352 KB Output is correct
25 Correct 57 ms 12372 KB Output is correct
26 Correct 57 ms 12112 KB Output is correct
27 Correct 174 ms 28240 KB Output is correct
28 Correct 158 ms 22096 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Execution timed out 1178 ms 1580576 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1628 KB Output is correct
7 Correct 166 ms 30288 KB Output is correct
8 Correct 0 ms 348 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 7 ms 1372 KB Output is correct
13 Correct 159 ms 22116 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 70 ms 12116 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 39 ms 5980 KB Output is correct
21 Correct 155 ms 23120 KB Output is correct
22 Correct 157 ms 22352 KB Output is correct
23 Correct 175 ms 26204 KB Output is correct
24 Correct 166 ms 22352 KB Output is correct
25 Correct 57 ms 12372 KB Output is correct
26 Correct 57 ms 12112 KB Output is correct
27 Correct 174 ms 28240 KB Output is correct
28 Correct 158 ms 22096 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Execution timed out 1178 ms 1580576 KB Time limit exceeded
34 Halted 0 ms 0 KB -