oj.uz

Submission #1007444

# Submission time Handle Problem Language Result Execution time Memory
1007444 2024-06-25T01:19:31 Z u_suck_o Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 126 ms 22208 KB 
#include "supertrees.h"
#include "bits/stdc++.h"
#define MAXN 1005

using namespace std;

int N;
int sizes[MAXN], par[MAXN];
vector<int> comps[MAXN], comps1[MAXN];
vector<vector<int>> answer;

int find(int u) {
    if (u != par[u])
        par[u] = find(par[u]);
    return par[u];
}

void join(int u, int v) {
    u = find(u);
    v = find(v);
    if (u == v) return;
    //answer[u][v] = 1;
    //answer[v][u] = 1;
    if (sizes[u] > sizes[v]) {
        par[v] = u;
        sizes[u] += sizes[v];
    } else {
        par[u] = v;
        sizes[v] += sizes[u];
    }
}

void reset_dsu() {
    for (int i = 0; i < N; i++) {
        par[i] = i;
        sizes[i] = 1;
    }
}
int construct(vector<vector<int>> p) {
    N = p.size();
    answer = vector<vector<int>>(N, vector<int>(N, 0));
    
    //run dsu
    reset_dsu();
    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])
                join(i, j);
        }
    }
    //build components
    for (int i = 0; i < N; i++)
        comps[find(i)].push_back(i);
    
    //run dsu again to find comps of 1
    reset_dsu();
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < comps[i].size(); j++) {
            for (int k = j+1; k < comps[i].size(); k++) {
                int x = comps[i][j], y = comps[i][k];
                if (p[x][y] == 0) return 0;
                if (p[x][y] == 1) join(x, y);
            }
        }
    }
    vector<int> reps;
    for (int i = 0; i < N; i++)
        comps1[find(i)].push_back(i);
    
    //check validity
    for (int i = 0; i < N; i++) {
        for (int j = i+1; j < N; j++) {
            if (find(i) == find(j) && p[i][j] != 1)
                return 0;
        }
    }
    
    //build paths
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < ((int) comps1[i].size())-1; j++) {
            answer[comps1[i][j]][comps1[i][j+1]] = 1;
            answer[comps1[i][j+1]][comps1[i][j]] = 1;
        }
    }
    
    //build rings
    for (int i = 0; i < N; i++) {
        vector<int> reps;
        for (int j : comps[i]) {
            if (j == find(j))
                reps.push_back(j);
        }
        int rsize = reps.size();
        if (rsize <= 1) continue;
        if (rsize == 2)
            return 0;
        for (int j = 0; j < rsize - 1; j++) {
            answer[reps[j]][reps[j+1]] = 1;
            answer[reps[j+1]][reps[j]] = 1;
        }
        answer[reps[0]][reps[rsize-1]] = 1;
        answer[reps[rsize-1]][reps[0]] = 1;
    }
    build(answer);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:60:27: 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 < comps[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~~~
supertrees.cpp:61:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             for (int k = j+1; k < comps[i].size(); k++) {
      |                               ~~^~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 5 ms 1156 KB Output is correct
7 Correct 117 ms 22064 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 5 ms 1156 KB Output is correct
7 Correct 117 ms 22064 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 344 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 113 ms 22096 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 61 ms 12116 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 360 KB Output is correct
20 Correct 28 ms 5836 KB Output is correct
21 Correct 119 ms 22100 KB Output is correct
22 Correct 112 ms 22092 KB Output is correct
23 Correct 121 ms 22096 KB Output is correct
24 Correct 112 ms 22100 KB Output is correct
25 Correct 52 ms 12112 KB Output is correct
26 Correct 48 ms 12116 KB Output is correct
27 Correct 126 ms 22100 KB Output is correct
28 Correct 110 ms 22208 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 344 KB Output is correct
8 Correct 5 ms 1372 KB Output is correct
9 Correct 112 ms 22084 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 1372 KB Output is correct
13 Correct 122 ms 22092 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 972 KB Output is correct
17 Correct 57 ms 12112 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 5952 KB Output is correct
22 Correct 113 ms 22084 KB Output is correct
23 Correct 118 ms 22100 KB Output is correct
24 Correct 124 ms 22092 KB Output is correct
25 Correct 53 ms 12372 KB Output is correct
26 Correct 49 ms 12116 KB Output is correct
27 Correct 111 ms 22096 KB Output is correct
28 Correct 115 ms 22088 KB Output is correct
29 Correct 50 ms 12364 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 28 ms 5924 KB Output is correct
5 Correct 100 ms 22100 KB Output is correct
6 Correct 110 ms 22096 KB Output is correct
7 Correct 113 ms 22084 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 29 ms 5720 KB Output is correct
10 Correct 111 ms 22096 KB Output is correct
11 Correct 112 ms 22100 KB Output is correct
12 Correct 126 ms 22096 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 28 ms 5960 KB Output is correct
17 Correct 109 ms 22180 KB Output is correct
18 Correct 116 ms 22100 KB Output is correct
19 Correct 98 ms 22036 KB Output is correct
20 Correct 103 ms 22156 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 5 ms 1156 KB Output is correct
7 Correct 117 ms 22064 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 344 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 113 ms 22096 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 61 ms 12116 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 360 KB Output is correct
20 Correct 28 ms 5836 KB Output is correct
21 Correct 119 ms 22100 KB Output is correct
22 Correct 112 ms 22092 KB Output is correct
23 Correct 121 ms 22096 KB Output is correct
24 Correct 112 ms 22100 KB Output is correct
25 Correct 52 ms 12112 KB Output is correct
26 Correct 48 ms 12116 KB Output is correct
27 Correct 126 ms 22100 KB Output is correct
28 Correct 110 ms 22208 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 344 KB Output is correct
36 Correct 5 ms 1372 KB Output is correct
37 Correct 112 ms 22084 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 5 ms 1372 KB Output is correct
41 Correct 122 ms 22092 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 972 KB Output is correct
45 Correct 57 ms 12112 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 5952 KB Output is correct
50 Correct 113 ms 22084 KB Output is correct
51 Correct 118 ms 22100 KB Output is correct
52 Correct 124 ms 22092 KB Output is correct
53 Correct 53 ms 12372 KB Output is correct
54 Correct 49 ms 12116 KB Output is correct
55 Correct 111 ms 22096 KB Output is correct
56 Correct 115 ms 22088 KB Output is correct
57 Correct 50 ms 12364 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 856 KB Output is correct
61 Correct 57 ms 12116 KB Output is correct
62 Correct 0 ms 344 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 29 ms 5876 KB Output is correct
66 Correct 49 ms 12116 KB Output is correct
67 Correct 46 ms 12112 KB Output is correct
68 Correct 54 ms 12116 KB Output is correct
69 Correct 55 ms 12344 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 5 ms 1156 KB Output is correct
7 Correct 117 ms 22064 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 344 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 113 ms 22096 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 61 ms 12116 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 360 KB Output is correct
20 Correct 28 ms 5836 KB Output is correct
21 Correct 119 ms 22100 KB Output is correct
22 Correct 112 ms 22092 KB Output is correct
23 Correct 121 ms 22096 KB Output is correct
24 Correct 112 ms 22100 KB Output is correct
25 Correct 52 ms 12112 KB Output is correct
26 Correct 48 ms 12116 KB Output is correct
27 Correct 126 ms 22100 KB Output is correct
28 Correct 110 ms 22208 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 344 KB Output is correct
36 Correct 5 ms 1372 KB Output is correct
37 Correct 112 ms 22084 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 5 ms 1372 KB Output is correct
41 Correct 122 ms 22092 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 972 KB Output is correct
45 Correct 57 ms 12112 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 5952 KB Output is correct
50 Correct 113 ms 22084 KB Output is correct
51 Correct 118 ms 22100 KB Output is correct
52 Correct 124 ms 22092 KB Output is correct
53 Correct 53 ms 12372 KB Output is correct
54 Correct 49 ms 12116 KB Output is correct
55 Correct 111 ms 22096 KB Output is correct
56 Correct 115 ms 22088 KB Output is correct
57 Correct 50 ms 12364 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 0 ms 600 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 28 ms 5924 KB Output is correct
62 Correct 100 ms 22100 KB Output is correct
63 Correct 110 ms 22096 KB Output is correct
64 Correct 113 ms 22084 KB Output is correct
65 Correct 1 ms 344 KB Output is correct
66 Correct 29 ms 5720 KB Output is correct
67 Correct 111 ms 22096 KB Output is correct
68 Correct 112 ms 22100 KB Output is correct
69 Correct 126 ms 22096 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 28 ms 5960 KB Output is correct
74 Correct 109 ms 22180 KB Output is correct
75 Correct 116 ms 22100 KB Output is correct
76 Correct 98 ms 22036 KB Output is correct
77 Correct 103 ms 22156 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 3 ms 856 KB Output is correct
81 Correct 57 ms 12116 KB Output is correct
82 Correct 0 ms 344 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 29 ms 5876 KB Output is correct
86 Correct 49 ms 12116 KB Output is correct
87 Correct 46 ms 12112 KB Output is correct
88 Correct 54 ms 12116 KB Output is correct
89 Correct 55 ms 12344 KB Output is correct
90 Correct 0 ms 344 KB Output is correct
91 Correct 0 ms 348 KB Output is correct
92 Correct 2 ms 904 KB Output is correct
93 Correct 52 ms 12092 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 344 KB Output is correct
97 Correct 12 ms 3272 KB Output is correct
98 Correct 55 ms 12116 KB Output is correct
99 Correct 61 ms 12108 KB Output is correct
100 Correct 45 ms 12112 KB Output is correct
101 Correct 45 ms 12112 KB Output is correct
102 Correct 47 ms 12116 KB Output is correct
103 Correct 52 ms 12116 KB Output is correct
104 Correct 52 ms 12100 KB Output is correct
105 Correct 62 ms 12116 KB Output is correct