oj.uz

Submission #927419

# Submission time Handle Problem Language Result Execution time Memory
927419 2024-02-14T20:24:22 Z VMaksimoski008 Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 199 ms 26196 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;
 
struct DSU {
    int n, comp;
    vector<int> par, size;
 
    void config(int _n) {
        n = _n + 1;
        comp = _n;
        par.resize(n+1);
        size.resize(n+1, 1);
        for(int i=1; i<=n; i++) par[i] = i;
    }
 
    int get(int u) {
        if(u == par[u]) return u;
        return par[u] = get(par[u]);
    }
 
    bool uni(int u, int v) {
        u = get(u), v = get(v);
 
        if(u == v) return false;
        if(size[u] < size[v]) swap(u, v);
 
        size[u] += size[v];
        par[v] = u;
        comp--;
 
        return true;
    }
 
    int getComp() { return comp; }
    int getSize(int u) { return size[get(u)]; }
    bool sameSet(int u, int v) { return get(u) == get(v); }
    bool isLeader(int u) { return get(u) == u; }
};

vector<vector<int> > graph;
vector<bool> vis;
vector<int> G;

void dfs(int u) {
    vis[u] = 1;
    G.push_back(u);

    for(int &v : graph[u]) {
        if(vis[v]) continue;
        dfs(v);
    }
}
 
int construct(vector<vector<int> > p) {
    int n = p.size();
    vector<vector<int> > B(n, vector<int>(n, 0));
    graph.resize(n);
    vis.resize(n);

    DSU dsu; dsu.config(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] == 1 && i != j) {
                if(!dsu.sameSet(i, j)) {
                    dsu.uni(i, j);
                    B[i][j] = B[j][i] = 1;
                }
            }
        }
    }
 
    for(int i=0; i<n; i++) {
        for(int j=0; j<n; j++) {
            if(p[i][j] == 1 && !dsu.sameSet(i, j)) return 0;
            if(p[i][j] == 0 && dsu.sameSet(i, j)) return 0;
        }
    }

    bool ok = 0;

    for(int i=0; i<n; i++) {
        for(int j=i+1; j<n; j++) {
            if(p[i][j] == 2 && dsu.isLeader(i) && dsu.isLeader(j)) {
                ok = 1;
                graph[i].push_back(j);
                graph[j].push_back(i);
            }
        }
    }

    for(int i=0; i<n && ok; i++) {
        if(vis[i]) continue;

        G.clear();
        dfs(i);

        if(G.size() == 2) return 0;
        if(G.size() == 1) continue;

        for(int i=0; i<G.size()-1; i++)
            for(int j=i+1; j<G.size(); j++)
                if(p[G[i]][G[j]] != 2) return 0;

        G.push_back(G[0]);
        for(int i=0; i<G.size()-1; i++)
            B[G[i]][G[i+1]] = B[G[i+1]][G[i]] = 1;
    }

    build(B);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:103:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |         for(int i=0; i<G.size()-1; i++)
      |                      ~^~~~~~~~~~~
supertrees.cpp:104:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |             for(int j=i+1; j<G.size(); j++)
      |                            ~^~~~~~~~~
supertrees.cpp:108:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |         for(int i=0; i<G.size()-1; i++)
      |                      ~^~~~~~~~~~~

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 1 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 170 ms 22096 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 1 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 170 ms 22096 KB Output is correct
8 Correct 0 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 348 KB Output is correct
12 Correct 7 ms 1176 KB Output is correct
13 Correct 163 ms 22084 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 852 KB Output is correct
17 Correct 87 ms 12296 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 40 ms 5884 KB Output is correct
21 Correct 160 ms 22032 KB Output is correct
22 Correct 157 ms 22072 KB Output is correct
23 Correct 181 ms 22020 KB Output is correct
24 Correct 199 ms 22064 KB Output is correct
25 Correct 66 ms 12292 KB Output is correct
26 Correct 60 ms 12116 KB Output is correct
27 Correct 167 ms 22148 KB Output is correct
28 Correct 163 ms 22100 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 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 0 ms 436 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 6 ms 1116 KB Output is correct
9 Correct 161 ms 22156 KB Output is correct
10 Correct 1 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 171 ms 26196 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 860 KB Output is correct
17 Correct 81 ms 15128 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 40 ms 5732 KB Output is correct
22 Correct 162 ms 22864 KB Output is correct
23 Correct 155 ms 22044 KB Output is correct
24 Correct 169 ms 25344 KB Output is correct
25 Correct 62 ms 12292 KB Output is correct
26 Correct 65 ms 12820 KB Output is correct
27 Correct 158 ms 22100 KB Output is correct
28 Correct 181 ms 24128 KB Output is correct
29 Correct 61 ms 12116 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 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 40 ms 5784 KB Output is correct
5 Correct 178 ms 22032 KB Output is correct
6 Correct 157 ms 22096 KB Output is correct
7 Correct 182 ms 22176 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 42 ms 5852 KB Output is correct
10 Correct 158 ms 22608 KB Output is correct
11 Correct 156 ms 22128 KB Output is correct
12 Correct 176 ms 25156 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 600 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 40 ms 5776 KB Output is correct
17 Correct 159 ms 22552 KB Output is correct
18 Correct 171 ms 22656 KB Output is correct
19 Correct 178 ms 22320 KB Output is correct
20 Correct 158 ms 22100 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 1 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 170 ms 22096 KB Output is correct
8 Correct 0 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 348 KB Output is correct
12 Correct 7 ms 1176 KB Output is correct
13 Correct 163 ms 22084 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 852 KB Output is correct
17 Correct 87 ms 12296 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 40 ms 5884 KB Output is correct
21 Correct 160 ms 22032 KB Output is correct
22 Correct 157 ms 22072 KB Output is correct
23 Correct 181 ms 22020 KB Output is correct
24 Correct 199 ms 22064 KB Output is correct
25 Correct 66 ms 12292 KB Output is correct
26 Correct 60 ms 12116 KB Output is correct
27 Correct 167 ms 22148 KB Output is correct
28 Correct 163 ms 22100 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 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 436 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 6 ms 1116 KB Output is correct
37 Correct 161 ms 22156 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 7 ms 1372 KB Output is correct
41 Correct 171 ms 26196 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 4 ms 860 KB Output is correct
45 Correct 81 ms 15128 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 1 ms 344 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 40 ms 5732 KB Output is correct
50 Correct 162 ms 22864 KB Output is correct
51 Correct 155 ms 22044 KB Output is correct
52 Correct 169 ms 25344 KB Output is correct
53 Correct 62 ms 12292 KB Output is correct
54 Correct 65 ms 12820 KB Output is correct
55 Correct 158 ms 22100 KB Output is correct
56 Correct 181 ms 24128 KB Output is correct
57 Correct 61 ms 12116 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 4 ms 860 KB Output is correct
61 Correct 73 ms 12116 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 348 KB Output is correct
65 Correct 52 ms 5976 KB Output is correct
66 Correct 66 ms 12824 KB Output is correct
67 Correct 63 ms 12116 KB Output is correct
68 Correct 66 ms 12308 KB Output is correct
69 Correct 62 ms 12368 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 1 ms 348 KB Output is correct
6 Correct 7 ms 1116 KB Output is correct
7 Correct 170 ms 22096 KB Output is correct
8 Correct 0 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 348 KB Output is correct
12 Correct 7 ms 1176 KB Output is correct
13 Correct 163 ms 22084 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 852 KB Output is correct
17 Correct 87 ms 12296 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 40 ms 5884 KB Output is correct
21 Correct 160 ms 22032 KB Output is correct
22 Correct 157 ms 22072 KB Output is correct
23 Correct 181 ms 22020 KB Output is correct
24 Correct 199 ms 22064 KB Output is correct
25 Correct 66 ms 12292 KB Output is correct
26 Correct 60 ms 12116 KB Output is correct
27 Correct 167 ms 22148 KB Output is correct
28 Correct 163 ms 22100 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 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 436 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 6 ms 1116 KB Output is correct
37 Correct 161 ms 22156 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 7 ms 1372 KB Output is correct
41 Correct 171 ms 26196 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 4 ms 860 KB Output is correct
45 Correct 81 ms 15128 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 1 ms 344 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 40 ms 5732 KB Output is correct
50 Correct 162 ms 22864 KB Output is correct
51 Correct 155 ms 22044 KB Output is correct
52 Correct 169 ms 25344 KB Output is correct
53 Correct 62 ms 12292 KB Output is correct
54 Correct 65 ms 12820 KB Output is correct
55 Correct 158 ms 22100 KB Output is correct
56 Correct 181 ms 24128 KB Output is correct
57 Correct 61 ms 12116 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 40 ms 5784 KB Output is correct
62 Correct 178 ms 22032 KB Output is correct
63 Correct 157 ms 22096 KB Output is correct
64 Correct 182 ms 22176 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 42 ms 5852 KB Output is correct
67 Correct 158 ms 22608 KB Output is correct
68 Correct 156 ms 22128 KB Output is correct
69 Correct 176 ms 25156 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Correct 0 ms 600 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 40 ms 5776 KB Output is correct
74 Correct 159 ms 22552 KB Output is correct
75 Correct 171 ms 22656 KB Output is correct
76 Correct 178 ms 22320 KB Output is correct
77 Correct 158 ms 22100 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 4 ms 860 KB Output is correct
81 Correct 73 ms 12116 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 348 KB Output is correct
85 Correct 52 ms 5976 KB Output is correct
86 Correct 66 ms 12824 KB Output is correct
87 Correct 63 ms 12116 KB Output is correct
88 Correct 66 ms 12308 KB Output is correct
89 Correct 62 ms 12368 KB Output is correct
90 Correct 0 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 70 ms 12296 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 15 ms 3844 KB Output is correct
98 Correct 60 ms 14088 KB Output is correct
99 Correct 61 ms 14160 KB Output is correct
100 Correct 60 ms 14252 KB Output is correct
101 Correct 59 ms 14160 KB Output is correct
102 Correct 68 ms 14164 KB Output is correct
103 Correct 68 ms 14220 KB Output is correct
104 Correct 68 ms 14216 KB Output is correct
105 Correct 68 ms 14160 KB Output is correct