oj.uz

Submission #1066164

# Submission time Handle Problem Language Result Execution time Memory
1066164 2024-08-19T15:56:26 Z kkkkkkkk Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 147 ms 24200 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

int parent[1005], sz[1005], parent2[1005], sz2[1005];

int Find(int x) {
    if (x==parent[x])
        return x;
    return parent[x]=Find(parent[x]);
}

int Find2(int x) {
    if (x==parent2[x])
        return x;
    return parent2[x]=Find2(parent2[x]);
}

void Union(int a, int b) {
    a=Find(a), b=Find(b);
    if (a==b) return;
    if (sz[a]<sz[b])
        swap(a, b);
    sz[a]+=sz[b];
    parent[b]=a;
}

void Union2(int a, int b) {
    a=Find2(a), b=Find2(b);
    if (a==b) return;
    if (sz2[a]<sz2[b])
        swap(a, b);
    sz2[a]+=sz2[b];
    parent2[b]=a;
}

int construct(vector<vector<int> > paths) {
    int n=paths.size();
    vector<vector<int> > a(n, vector<int> (n, 0));
    for (int i=0;i<n;i++)
        sz[i]=1, parent[i]=i, sz2[i]=1, parent2[i]=i;
    for (int i=0;i<n;i++)
        for (int j=i+1;j<n;j++) {
            if (paths[i][j]==3) return 0;
            else if (paths[i][j]) Union(i, j);
        }
    vector<int> gr[n];
    for (int i=0;i<n;i++) {
        int lider=Find(i);
        gr[lider].push_back(i);
    }
    for (int i=0;i<n;i++) {
        if (!gr[i].size()) continue;
        for (auto x:gr[i])
            for (auto y:gr[i])
                if (!paths[x][y])
                    return 0;
        vector<int> roots;
        for (int j=0;j<gr[i].size();j++) {
            int x=gr[i][j];
            for (int k=j+1;k<gr[i].size();k++) {
                int y=gr[i][k];
                if (paths[x][y]==1) Union2(x, y);
            }
        }
        for (int j=0;j<gr[i].size();j++) {
            int x=gr[i][j];
            for (int k=j+1;k<gr[i].size();k++) {
                int y=gr[i][k];
                if (paths[x][y]==2&&Find2(x)==Find2(y)) return 0;
            }
        }
        for (auto x:gr[i]) {
            if (Find2(x)==x) roots.push_back(x);
            else a[x][parent2[x]]=1, a[parent2[x]][x]=1;
        }
        if (roots.size()<=1) continue;
        if (roots.size()==2) return 0;
        int x=roots[0], y=roots[roots.size()-1];
        for (int j=0;j<roots.size()-1;j++)
            a[roots[j]][roots[j+1]]=1, a[roots[j+1]][roots[j]]=1;
        a[x][y]=1, a[y][x]=1;
    }
    build(a);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:60:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         for (int j=0;j<gr[i].size();j++) {
      |                      ~^~~~~~~~~~~~~
supertrees.cpp:62:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |             for (int k=j+1;k<gr[i].size();k++) {
      |                            ~^~~~~~~~~~~~~
supertrees.cpp:67:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |         for (int j=0;j<gr[i].size();j++) {
      |                      ~^~~~~~~~~~~~~
supertrees.cpp:69:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |             for (int k=j+1;k<gr[i].size();k++) {
      |                            ~^~~~~~~~~~~~~
supertrees.cpp:81:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |         for (int j=0;j<roots.size()-1;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 1352 KB Output is correct
7 Correct 120 ms 23484 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 1352 KB Output is correct
7 Correct 120 ms 23484 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 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 1368 KB Output is correct
13 Correct 114 ms 23384 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 59 ms 14220 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 29 ms 6300 KB Output is correct
21 Correct 118 ms 24076 KB Output is correct
22 Correct 120 ms 24128 KB Output is correct
23 Correct 123 ms 24144 KB Output is correct
24 Correct 112 ms 24144 KB Output is correct
25 Correct 49 ms 14164 KB Output is correct
26 Correct 47 ms 14164 KB Output is correct
27 Correct 118 ms 24148 KB Output is correct
28 Correct 110 ms 24200 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 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 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 5 ms 1360 KB Output is correct
9 Correct 111 ms 23428 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 5 ms 1228 KB Output is correct
13 Correct 116 ms 23380 KB Output is correct
14 Correct 1 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 57 ms 14092 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 28 ms 6232 KB Output is correct
22 Correct 114 ms 23944 KB Output is correct
23 Correct 115 ms 24144 KB Output is correct
24 Correct 128 ms 24148 KB Output is correct
25 Correct 48 ms 14164 KB Output is correct
26 Correct 50 ms 14220 KB Output is correct
27 Correct 115 ms 24192 KB Output is correct
28 Correct 121 ms 24144 KB Output is correct
29 Correct 50 ms 14260 KB Output is correct

Subtask #4
35.0 / 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 0 ms 348 KB Output is correct
4 Correct 28 ms 6292 KB Output is correct
5 Correct 116 ms 23320 KB Output is correct
6 Correct 110 ms 23304 KB Output is correct
7 Correct 129 ms 23476 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 29 ms 6280 KB Output is correct
10 Correct 112 ms 23376 KB Output is correct
11 Correct 115 ms 23376 KB Output is correct
12 Correct 121 ms 23380 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 34 ms 6480 KB Output is correct
17 Correct 121 ms 23380 KB Output is correct
18 Correct 115 ms 23380 KB Output is correct
19 Correct 147 ms 23452 KB Output is correct
20 Correct 114 ms 23284 KB Output is correct

Subtask #5
21.0 / 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 1352 KB Output is correct
7 Correct 120 ms 23484 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 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 1368 KB Output is correct
13 Correct 114 ms 23384 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 59 ms 14220 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 29 ms 6300 KB Output is correct
21 Correct 118 ms 24076 KB Output is correct
22 Correct 120 ms 24128 KB Output is correct
23 Correct 123 ms 24144 KB Output is correct
24 Correct 112 ms 24144 KB Output is correct
25 Correct 49 ms 14164 KB Output is correct
26 Correct 47 ms 14164 KB Output is correct
27 Correct 118 ms 24148 KB Output is correct
28 Correct 110 ms 24200 KB Output is correct
29 Correct 0 ms 344 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 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 5 ms 1360 KB Output is correct
37 Correct 111 ms 23428 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 1 ms 344 KB Output is correct
40 Correct 5 ms 1228 KB Output is correct
41 Correct 116 ms 23380 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 860 KB Output is correct
45 Correct 57 ms 14092 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 28 ms 6232 KB Output is correct
50 Correct 114 ms 23944 KB Output is correct
51 Correct 115 ms 24144 KB Output is correct
52 Correct 128 ms 24148 KB Output is correct
53 Correct 48 ms 14164 KB Output is correct
54 Correct 50 ms 14220 KB Output is correct
55 Correct 115 ms 24192 KB Output is correct
56 Correct 121 ms 24144 KB Output is correct
57 Correct 50 ms 14260 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 3 ms 860 KB Output is correct
61 Correct 56 ms 14224 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 344 KB Output is correct
65 Correct 30 ms 6224 KB Output is correct
66 Correct 53 ms 14160 KB Output is correct
67 Correct 52 ms 14164 KB Output is correct
68 Correct 58 ms 14160 KB Output is correct
69 Correct 50 ms 14160 KB Output is correct

Subtask #6
4.0 / 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 1352 KB Output is correct
7 Correct 120 ms 23484 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 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 1368 KB Output is correct
13 Correct 114 ms 23384 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 59 ms 14220 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 29 ms 6300 KB Output is correct
21 Correct 118 ms 24076 KB Output is correct
22 Correct 120 ms 24128 KB Output is correct
23 Correct 123 ms 24144 KB Output is correct
24 Correct 112 ms 24144 KB Output is correct
25 Correct 49 ms 14164 KB Output is correct
26 Correct 47 ms 14164 KB Output is correct
27 Correct 118 ms 24148 KB Output is correct
28 Correct 110 ms 24200 KB Output is correct
29 Correct 0 ms 344 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 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 5 ms 1360 KB Output is correct
37 Correct 111 ms 23428 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 1 ms 344 KB Output is correct
40 Correct 5 ms 1228 KB Output is correct
41 Correct 116 ms 23380 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 860 KB Output is correct
45 Correct 57 ms 14092 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 28 ms 6232 KB Output is correct
50 Correct 114 ms 23944 KB Output is correct
51 Correct 115 ms 24144 KB Output is correct
52 Correct 128 ms 24148 KB Output is correct
53 Correct 48 ms 14164 KB Output is correct
54 Correct 50 ms 14220 KB Output is correct
55 Correct 115 ms 24192 KB Output is correct
56 Correct 121 ms 24144 KB Output is correct
57 Correct 50 ms 14260 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 28 ms 6292 KB Output is correct
62 Correct 116 ms 23320 KB Output is correct
63 Correct 110 ms 23304 KB Output is correct
64 Correct 129 ms 23476 KB Output is correct
65 Correct 0 ms 344 KB Output is correct
66 Correct 29 ms 6280 KB Output is correct
67 Correct 112 ms 23376 KB Output is correct
68 Correct 115 ms 23376 KB Output is correct
69 Correct 121 ms 23380 KB Output is correct
70 Correct 0 ms 348 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 34 ms 6480 KB Output is correct
74 Correct 121 ms 23380 KB Output is correct
75 Correct 115 ms 23380 KB Output is correct
76 Correct 147 ms 23452 KB Output is correct
77 Correct 114 ms 23284 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 1 ms 348 KB Output is correct
80 Correct 3 ms 860 KB Output is correct
81 Correct 56 ms 14224 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 344 KB Output is correct
85 Correct 30 ms 6224 KB Output is correct
86 Correct 53 ms 14160 KB Output is correct
87 Correct 52 ms 14164 KB Output is correct
88 Correct 58 ms 14160 KB Output is correct
89 Correct 50 ms 14160 KB Output is correct
90 Correct 1 ms 348 KB Output is correct
91 Correct 0 ms 348 KB Output is correct
92 Correct 3 ms 860 KB Output is correct
93 Correct 56 ms 14092 KB Output is correct
94 Correct 0 ms 348 KB Output is correct
95 Correct 0 ms 348 KB Output is correct
96 Correct 0 ms 348 KB Output is correct
97 Correct 12 ms 3932 KB Output is correct
98 Correct 49 ms 14096 KB Output is correct
99 Correct 53 ms 14160 KB Output is correct
100 Correct 50 ms 14164 KB Output is correct
101 Correct 48 ms 14160 KB Output is correct
102 Correct 49 ms 14160 KB Output is correct
103 Correct 48 ms 14160 KB Output is correct
104 Correct 49 ms 14216 KB Output is correct
105 Correct 56 ms 14164 KB Output is correct