oj.uz

Submission #927409

# Submission time Handle Problem Language Result Execution time Memory
927409 2024-02-14T20:13:00 Z VMaksimoski008 Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 175 ms 26276 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] == 1) {
                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[i][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:102:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |         for(int i=0; i<G.size()-1; i++)
      |                      ~^~~~~~~~~~~
supertrees.cpp:103:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |             for(int j=i+1; j<G.size(); j++)
      |                            ~^~~~~~~~~
supertrees.cpp:107:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |         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 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 7 ms 1112 KB Output is correct
7 Correct 159 ms 22052 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 7 ms 1112 KB Output is correct
7 Correct 159 ms 22052 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 160 ms 22028 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 12292 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 43 ms 5892 KB Output is correct
21 Correct 160 ms 22028 KB Output is correct
22 Correct 168 ms 22040 KB Output is correct
23 Correct 165 ms 21988 KB Output is correct
24 Correct 153 ms 22036 KB Output is correct
25 Correct 72 ms 12296 KB Output is correct
26 Correct 69 ms 12112 KB Output is correct
27 Correct 166 ms 22096 KB Output is correct
28 Correct 160 ms 22368 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 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 356 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 7 ms 1116 KB Output is correct
9 Correct 153 ms 22168 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 26276 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 6 ms 860 KB Output is correct
17 Correct 90 ms 15128 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Incorrect 19 ms 3420 KB Answer gives possible 0 while actual possible 1
22 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 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 40 ms 5936 KB Output is correct
5 Correct 158 ms 22024 KB Output is correct
6 Correct 155 ms 22136 KB Output is correct
7 Correct 175 ms 22024 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 19 ms 3428 KB Answer gives possible 0 while actual possible 1
10 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 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 7 ms 1112 KB Output is correct
7 Correct 159 ms 22052 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 160 ms 22028 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 12292 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 43 ms 5892 KB Output is correct
21 Correct 160 ms 22028 KB Output is correct
22 Correct 168 ms 22040 KB Output is correct
23 Correct 165 ms 21988 KB Output is correct
24 Correct 153 ms 22036 KB Output is correct
25 Correct 72 ms 12296 KB Output is correct
26 Correct 69 ms 12112 KB Output is correct
27 Correct 166 ms 22096 KB Output is correct
28 Correct 160 ms 22368 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 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 356 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1116 KB Output is correct
37 Correct 153 ms 22168 KB Output is correct
38 Correct 0 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 159 ms 26276 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 6 ms 860 KB Output is correct
45 Correct 90 ms 15128 KB Output is correct
46 Correct 0 ms 344 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Incorrect 19 ms 3420 KB Answer gives possible 0 while actual possible 1
50 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 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 7 ms 1112 KB Output is correct
7 Correct 159 ms 22052 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1116 KB Output is correct
13 Correct 160 ms 22028 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 12292 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 43 ms 5892 KB Output is correct
21 Correct 160 ms 22028 KB Output is correct
22 Correct 168 ms 22040 KB Output is correct
23 Correct 165 ms 21988 KB Output is correct
24 Correct 153 ms 22036 KB Output is correct
25 Correct 72 ms 12296 KB Output is correct
26 Correct 69 ms 12112 KB Output is correct
27 Correct 166 ms 22096 KB Output is correct
28 Correct 160 ms 22368 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 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 356 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1116 KB Output is correct
37 Correct 153 ms 22168 KB Output is correct
38 Correct 0 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 159 ms 26276 KB Output is correct
42 Correct 0 ms 344 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 6 ms 860 KB Output is correct
45 Correct 90 ms 15128 KB Output is correct
46 Correct 0 ms 344 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Incorrect 19 ms 3420 KB Answer gives possible 0 while actual possible 1
50 Halted 0 ms 0 KB -