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Submission #766867

# Submission time Handle Problem Language Result Execution time Memory
766867 2023-06-26T08:20:04 Z danikoynov Simurgh (IOI17_simurgh) C++14
51 / 100
 86 ms 1876 KB 
#include "simurgh.h"
#include <bits/stdc++.h>

using namespace std;

const int maxn = 510;
struct disjoint_set_union
{
    int par[maxn];

    disjoint_set_union(){};

    disjoint_set_union(int n)
    {
        for (int i = 0; i < n; i ++)
            par[i] = i;
    }

    int find_leader(int v)
    {
        if (v == par[v])
            return v;
        return (par[v] = find_leader(par[v]));
    }

    bool is_connected(int v, int u)
    {
        return find_leader(v) == find_leader(u);
    }

    void unite(int v, int u)
    {
        v = find_leader(v);
        u = find_leader(u);
        if (v == u)
            return;
        par[v] = u;
    }
};

int used[maxn * maxn];
vector<int> find_roads(int n, vector<int> u, vector<int> v) {
	vector < int > gold;
	int m = u.size();
	while(gold.size() < n - 1)
    {
        disjoint_set_union dsu(n);
        int cp = n;
        vector < int > res;
        for (int edge : gold)
        {
            dsu.unite(u[edge], v[edge]);
             cp --;
             res.push_back(edge);
        }
        for (int j = 0; j < m && cp > 2; j ++)
        {
            if (!dsu.is_connected(u[j], v[j]))
            {
                dsu.unite(u[j], v[j]);
                cp --;
                res.push_back(j);
            }
        }
        vector < pair < int, int > > pot;
        for (int i = 0; i < m; i ++)
        {
            if (!dsu.is_connected(u[i], v[i]) && !used[i])
            {
                used[i] = 1;
                pot.push_back({i, 0});
            }
        }

        int mx = -1, rd = -1;
        for (int i = 0; i < pot.size(); i ++)
        {
            res.push_back(pot[i].first);
            pot[i].second = count_common_roads(res);
            if (pot[i].second > mx)
            {
                mx = pot[i].second;
            }
            res.pop_back();
        }
        for (int i = 0; i < pot.size(); i ++)
        {
            if (pot[i].second == mx)
                gold.push_back(pot[i].first);
        }
    }
	return gold;
}

Compilation message

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:45:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   45 |  while(gold.size() < n - 1)
      |        ~~~~~~~~~~~~^~~~~~~
simurgh.cpp:76:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |         for (int i = 0; i < pot.size(); i ++)
      |                         ~~^~~~~~~~~~~~
simurgh.cpp:86:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |         for (int i = 0; i < pot.size(); i ++)
      |                         ~~^~~~~~~~~~~~
simurgh.cpp:75:22: warning: unused variable 'rd' [-Wunused-variable]
   75 |         int mx = -1, rd = -1;
      |                      ^~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 0 ms 212 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 1 ms 212 KB correct
12 Correct 0 ms 212 KB correct
13 Correct 0 ms 212 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 0 ms 212 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 1 ms 212 KB correct
12 Correct 0 ms 212 KB correct
13 Correct 0 ms 212 KB correct
14 Correct 1 ms 212 KB correct
15 Correct 1 ms 308 KB correct
16 Correct 1 ms 212 KB correct
17 Correct 1 ms 212 KB correct
18 Correct 1 ms 212 KB correct
19 Correct 1 ms 212 KB correct
20 Correct 1 ms 212 KB correct
21 Correct 1 ms 212 KB correct
22 Correct 1 ms 212 KB correct
23 Correct 1 ms 212 KB correct
24 Correct 1 ms 212 KB correct
25 Correct 1 ms 212 KB correct
26 Correct 2 ms 212 KB correct
27 Correct 1 ms 212 KB correct
28 Correct 1 ms 212 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 1 ms 212 KB correct
31 Correct 1 ms 212 KB correct
32 Correct 1 ms 212 KB correct
33 Correct 1 ms 212 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 0 ms 212 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 1 ms 212 KB correct
12 Correct 0 ms 212 KB correct
13 Correct 0 ms 212 KB correct
14 Correct 1 ms 212 KB correct
15 Correct 1 ms 308 KB correct
16 Correct 1 ms 212 KB correct
17 Correct 1 ms 212 KB correct
18 Correct 1 ms 212 KB correct
19 Correct 1 ms 212 KB correct
20 Correct 1 ms 212 KB correct
21 Correct 1 ms 212 KB correct
22 Correct 1 ms 212 KB correct
23 Correct 1 ms 212 KB correct
24 Correct 1 ms 212 KB correct
25 Correct 1 ms 212 KB correct
26 Correct 2 ms 212 KB correct
27 Correct 1 ms 212 KB correct
28 Correct 1 ms 212 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 1 ms 212 KB correct
31 Correct 1 ms 212 KB correct
32 Correct 1 ms 212 KB correct
33 Correct 1 ms 212 KB correct
34 Correct 86 ms 864 KB correct
35 Correct 73 ms 1064 KB correct
36 Correct 61 ms 816 KB correct
37 Correct 4 ms 312 KB correct
38 Correct 85 ms 1064 KB correct
39 Correct 66 ms 956 KB correct
40 Correct 52 ms 724 KB correct
41 Correct 37 ms 980 KB correct
42 Correct 64 ms 1072 KB correct
43 Correct 44 ms 728 KB correct
44 Correct 36 ms 644 KB correct
45 Correct 43 ms 704 KB correct
46 Correct 37 ms 744 KB correct
47 Correct 15 ms 316 KB correct
48 Correct 3 ms 312 KB correct
49 Correct 5 ms 344 KB correct
50 Correct 15 ms 320 KB correct
51 Correct 41 ms 692 KB correct
52 Correct 37 ms 632 KB correct
53 Correct 33 ms 592 KB correct
54 Correct 44 ms 724 KB correct
55 Correct 50 ms 716 KB correct
56 Correct 42 ms 708 KB correct
57 Correct 42 ms 724 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Incorrect 62 ms 1876 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 0 ms 212 KB correct
3 Correct 0 ms 212 KB correct
4 Correct 0 ms 212 KB correct
5 Correct 0 ms 212 KB correct
6 Correct 0 ms 212 KB correct
7 Correct 0 ms 212 KB correct
8 Correct 0 ms 212 KB correct
9 Correct 0 ms 212 KB correct
10 Correct 0 ms 212 KB correct
11 Correct 1 ms 212 KB correct
12 Correct 0 ms 212 KB correct
13 Correct 0 ms 212 KB correct
14 Correct 1 ms 212 KB correct
15 Correct 1 ms 308 KB correct
16 Correct 1 ms 212 KB correct
17 Correct 1 ms 212 KB correct
18 Correct 1 ms 212 KB correct
19 Correct 1 ms 212 KB correct
20 Correct 1 ms 212 KB correct
21 Correct 1 ms 212 KB correct
22 Correct 1 ms 212 KB correct
23 Correct 1 ms 212 KB correct
24 Correct 1 ms 212 KB correct
25 Correct 1 ms 212 KB correct
26 Correct 2 ms 212 KB correct
27 Correct 1 ms 212 KB correct
28 Correct 1 ms 212 KB correct
29 Correct 1 ms 212 KB correct
30 Correct 1 ms 212 KB correct
31 Correct 1 ms 212 KB correct
32 Correct 1 ms 212 KB correct
33 Correct 1 ms 212 KB correct
34 Correct 86 ms 864 KB correct
35 Correct 73 ms 1064 KB correct
36 Correct 61 ms 816 KB correct
37 Correct 4 ms 312 KB correct
38 Correct 85 ms 1064 KB correct
39 Correct 66 ms 956 KB correct
40 Correct 52 ms 724 KB correct
41 Correct 37 ms 980 KB correct
42 Correct 64 ms 1072 KB correct
43 Correct 44 ms 728 KB correct
44 Correct 36 ms 644 KB correct
45 Correct 43 ms 704 KB correct
46 Correct 37 ms 744 KB correct
47 Correct 15 ms 316 KB correct
48 Correct 3 ms 312 KB correct
49 Correct 5 ms 344 KB correct
50 Correct 15 ms 320 KB correct
51 Correct 41 ms 692 KB correct
52 Correct 37 ms 632 KB correct
53 Correct 33 ms 592 KB correct
54 Correct 44 ms 724 KB correct
55 Correct 50 ms 716 KB correct
56 Correct 42 ms 708 KB correct
57 Correct 42 ms 724 KB correct
58 Correct 0 ms 212 KB correct
59 Correct 0 ms 212 KB correct
60 Incorrect 62 ms 1876 KB WA in grader: NO
61 Halted 0 ms 0 KB -