oj.uz

Submission #746091

# Submission time Handle Problem Language Result Execution time Memory
746091 2023-05-21T11:42:29 Z JakobZorz Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 217 ms 28048 KB 
#include "supertrees.h"
#include <vector>
using namespace std;

vector<vector<int>> answer;
int group_ids[1000];
vector<int> groups[1000];
vector<vector<int>> p;
int num_groups;

void connect(int a, int b){
    answer[a][b]=1;
    answer[b][a]=1;
}

int connect_group(int group_id){
    vector<int> group=groups[group_id];
    vector<bool> in_cycle(group.size(),false);
    vector<int> tree_ids(group.size(),-1);
    vector<int> trees[1000];
    
    int num_trees=0;
    for(int i=0;i<group.size();i++){
        if(tree_ids[i]!=-1)
            continue;
        tree_ids[i]=num_trees;
        trees[num_trees].push_back(i);
        for(int j=0;j<group.size();j++){
            if(i!=j&&p[group[i]][group[j]]==1){
                tree_ids[j]=num_trees;
                trees[num_trees].push_back(j);
                connect(group[i],group[j]);
            }
        }
        num_trees++;
    }
    
    for(int i=0;i<group.size();i++)
        for(int j=0;j<group.size();j++){
            if(tree_ids[i]==tree_ids[j]&&p[group[i]][group[j]]==2)
                return 0;
            if(tree_ids[i]!=tree_ids[j]&&p[group[i]][group[j]]==1)
                return 0;
        }
    
    if(num_trees==2)
        return 0;
    
    for(int i=0;i<num_trees-1;i++)
        connect(group[trees[i][0]],group[trees[i+1][0]]);
    if(num_trees!=1)
        connect(group[trees[0][0]],group[trees[num_trees-1][0]]);
    return 1;
}

int construct(vector<vector<int>> p_) {
    p=p_;
    int n = p.size();
    answer=vector<vector<int>>(n,vector<int>(n,0));
    for(vector<int>& i:p)
        for(int j:i)
            if(j==3)
                return 0;
    for(int i=0;i<n;i++)
        group_ids[i]=-1;
    
    for(int i=0;i<n;i++){
        if(group_ids[i]!=-1)
            continue;
        
        group_ids[i]=num_groups;
        groups[num_groups].push_back(i);
        for(int j=i+1;j<n;j++){
            if(p[i][j]!=0){
                group_ids[j]=num_groups;
                groups[num_groups].push_back(j);
            }
        }
        num_groups++;
    }
    
    for(int i=0;i<n;i++)
        for(int j=i+1;j<n;j++){
            if(group_ids[i]!=group_ids[j]&&p[i][j]!=0)
                return 0;
            if(group_ids[i]==group_ids[j]&&p[i][j]==0)
                return 0;
        }
    
    for(int i=0;i<num_groups;i++)
        if(connect_group(i)==0)
            return 0;
    
	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int connect_group(int)':
supertrees.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i=0;i<group.size();i++){
      |                 ~^~~~~~~~~~~~~
supertrees.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for(int j=0;j<group.size();j++){
      |                     ~^~~~~~~~~~~~~
supertrees.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int i=0;i<group.size();i++)
      |                 ~^~~~~~~~~~~~~
supertrees.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int j=0;j<group.size();j++){
      |                     ~^~~~~~~~~~~~~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:90:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   90 |     for(int i=0;i<num_groups;i++)
      |     ^~~
supertrees.cpp:94:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   94 |  build(answer);
      |  ^~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 184 ms 26036 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 184 ms 26036 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 8 ms 1364 KB Output is correct
13 Correct 175 ms 26016 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 75 ms 16032 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 64 ms 6784 KB Output is correct
21 Correct 176 ms 26012 KB Output is correct
22 Correct 170 ms 26016 KB Output is correct
23 Correct 176 ms 26000 KB Output is correct
24 Correct 195 ms 26020 KB Output is correct
25 Correct 69 ms 16076 KB Output is correct
26 Correct 66 ms 16028 KB Output is correct
27 Correct 181 ms 26024 KB Output is correct
28 Correct 169 ms 26004 KB Output is correct

Subtask #3
19.0 / 19.0

# 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 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 8 ms 1364 KB Output is correct
9 Correct 171 ms 27956 KB Output is correct
10 Correct 1 ms 316 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 8 ms 1364 KB Output is correct
13 Correct 174 ms 28048 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 316 KB Output is correct
16 Correct 4 ms 980 KB Output is correct
17 Correct 75 ms 18064 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 46 ms 7204 KB Output is correct
22 Correct 188 ms 27916 KB Output is correct
23 Correct 169 ms 28036 KB Output is correct
24 Correct 175 ms 27884 KB Output is correct
25 Correct 74 ms 18052 KB Output is correct
26 Correct 91 ms 18112 KB Output is correct
27 Correct 172 ms 28044 KB Output is correct
28 Correct 193 ms 27916 KB Output is correct
29 Correct 73 ms 18060 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 45 ms 6724 KB Output is correct
5 Correct 177 ms 26044 KB Output is correct
6 Correct 217 ms 26004 KB Output is correct
7 Correct 188 ms 25996 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 58 ms 6808 KB Output is correct
10 Correct 172 ms 26004 KB Output is correct
11 Correct 168 ms 25956 KB Output is correct
12 Correct 188 ms 25960 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 43 ms 6804 KB Output is correct
17 Correct 167 ms 26060 KB Output is correct
18 Correct 177 ms 25972 KB Output is correct
19 Correct 166 ms 26032 KB Output is correct
20 Correct 172 ms 26000 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 184 ms 26036 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 8 ms 1364 KB Output is correct
13 Correct 175 ms 26016 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 75 ms 16032 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 64 ms 6784 KB Output is correct
21 Correct 176 ms 26012 KB Output is correct
22 Correct 170 ms 26016 KB Output is correct
23 Correct 176 ms 26000 KB Output is correct
24 Correct 195 ms 26020 KB Output is correct
25 Correct 69 ms 16076 KB Output is correct
26 Correct 66 ms 16028 KB Output is correct
27 Correct 181 ms 26024 KB Output is correct
28 Correct 169 ms 26004 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 8 ms 1364 KB Output is correct
37 Correct 171 ms 27956 KB Output is correct
38 Correct 1 ms 316 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 8 ms 1364 KB Output is correct
41 Correct 174 ms 28048 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 0 ms 316 KB Output is correct
44 Correct 4 ms 980 KB Output is correct
45 Correct 75 ms 18064 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 46 ms 7204 KB Output is correct
50 Correct 188 ms 27916 KB Output is correct
51 Correct 169 ms 28036 KB Output is correct
52 Correct 175 ms 27884 KB Output is correct
53 Correct 74 ms 18052 KB Output is correct
54 Correct 91 ms 18112 KB Output is correct
55 Correct 172 ms 28044 KB Output is correct
56 Correct 193 ms 27916 KB Output is correct
57 Correct 73 ms 18060 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 4 ms 1036 KB Output is correct
61 Correct 75 ms 18068 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 1 ms 312 KB Output is correct
64 Correct 0 ms 212 KB Output is correct
65 Correct 44 ms 7296 KB Output is correct
66 Correct 96 ms 18048 KB Output is correct
67 Correct 69 ms 17936 KB Output is correct
68 Correct 70 ms 18040 KB Output is correct
69 Correct 69 ms 18052 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 184 ms 26036 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 8 ms 1364 KB Output is correct
13 Correct 175 ms 26016 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 75 ms 16032 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 64 ms 6784 KB Output is correct
21 Correct 176 ms 26012 KB Output is correct
22 Correct 170 ms 26016 KB Output is correct
23 Correct 176 ms 26000 KB Output is correct
24 Correct 195 ms 26020 KB Output is correct
25 Correct 69 ms 16076 KB Output is correct
26 Correct 66 ms 16028 KB Output is correct
27 Correct 181 ms 26024 KB Output is correct
28 Correct 169 ms 26004 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 8 ms 1364 KB Output is correct
37 Correct 171 ms 27956 KB Output is correct
38 Correct 1 ms 316 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 8 ms 1364 KB Output is correct
41 Correct 174 ms 28048 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 0 ms 316 KB Output is correct
44 Correct 4 ms 980 KB Output is correct
45 Correct 75 ms 18064 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 46 ms 7204 KB Output is correct
50 Correct 188 ms 27916 KB Output is correct
51 Correct 169 ms 28036 KB Output is correct
52 Correct 175 ms 27884 KB Output is correct
53 Correct 74 ms 18052 KB Output is correct
54 Correct 91 ms 18112 KB Output is correct
55 Correct 172 ms 28044 KB Output is correct
56 Correct 193 ms 27916 KB Output is correct
57 Correct 73 ms 18060 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 0 ms 340 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 45 ms 6724 KB Output is correct
62 Correct 177 ms 26044 KB Output is correct
63 Correct 217 ms 26004 KB Output is correct
64 Correct 188 ms 25996 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 58 ms 6808 KB Output is correct
67 Correct 172 ms 26004 KB Output is correct
68 Correct 168 ms 25956 KB Output is correct
69 Correct 188 ms 25960 KB Output is correct
70 Correct 1 ms 212 KB Output is correct
71 Correct 1 ms 212 KB Output is correct
72 Correct 0 ms 340 KB Output is correct
73 Correct 43 ms 6804 KB Output is correct
74 Correct 167 ms 26060 KB Output is correct
75 Correct 177 ms 25972 KB Output is correct
76 Correct 166 ms 26032 KB Output is correct
77 Correct 172 ms 26000 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 1 ms 212 KB Output is correct
80 Correct 4 ms 1036 KB Output is correct
81 Correct 75 ms 18068 KB Output is correct
82 Correct 1 ms 212 KB Output is correct
83 Correct 1 ms 312 KB Output is correct
84 Correct 0 ms 212 KB Output is correct
85 Correct 44 ms 7296 KB Output is correct
86 Correct 96 ms 18048 KB Output is correct
87 Correct 69 ms 17936 KB Output is correct
88 Correct 70 ms 18040 KB Output is correct
89 Correct 69 ms 18052 KB Output is correct
90 Correct 1 ms 316 KB Output is correct
91 Correct 1 ms 340 KB Output is correct
92 Correct 4 ms 980 KB Output is correct
93 Correct 74 ms 17976 KB Output is correct
94 Correct 0 ms 212 KB Output is correct
95 Correct 1 ms 212 KB Output is correct
96 Correct 1 ms 212 KB Output is correct
97 Correct 18 ms 4736 KB Output is correct
98 Correct 66 ms 18060 KB Output is correct
99 Correct 66 ms 18052 KB Output is correct
100 Correct 69 ms 18052 KB Output is correct
101 Correct 66 ms 18048 KB Output is correct
102 Correct 74 ms 18048 KB Output is correct
103 Correct 100 ms 18056 KB Output is correct
104 Correct 67 ms 18056 KB Output is correct
105 Correct 72 ms 17976 KB Output is correct