oj.uz

Submission #955414

# Submission time Handle Problem Language Result Execution time Memory
955414 2024-03-30T11:57:18 Z Nelt Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 188 ms 32108 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
const ll N = 1005;
ll dsu[N];
ll repr(ll x)
{
    return dsu[x] < 0 ? x : dsu[x] = repr(dsu[x]);
}
bool Union(ll x, ll y)
{
    x = repr(x), y = repr(y);
    if (x == y)
        return false;
    if (dsu[x] < dsu[y])
        swap(x, y);
    dsu[y] += dsu[x];
    dsu[x] = y;
    return true;
}
vector<int> g[N];
ll cnt[N][N];
bool used[N];
void dfs(ll v, ll st)
{
    cnt[v][st]++;
    used[v] = 1;
    for (ll to : g[v])
        if (!used[to])
            dfs(to, st);
    used[v] = 0;
}
int construct(vector<vector<int>> p)
{
    ll n = p.size();
    vector<vector<int>> ans(n, vector<int>(n, 0));
    for (ll i = 0; i < n; i++)
        for (ll j = 0; j < n; j++)
            if (p[i][j] == 3)
                return false;
    for (ll i = 0; i < n; i++)
        dsu[i] = -1;
    for (ll i = 0; i < n; i++)
        for (ll j = 0; j < n; j++)
            if (p[i][j] == 1)
                Union(i, j);
    vector<int> v[n];
    for (ll i = 0; i < n; i++)
        v[repr(i)].push_back(i);
    vector<int> check;
    for (ll i = 0; i < n; i++)
    {
        if (!v[i].empty())
            check.push_back(i);
        for (ll j = 0; j + 1 < v[i].size(); j++)
            ans[v[i][j]][v[i][j + 1]] = ans[v[i][j + 1]][v[i][j]] = 1, g[v[i][j]].push_back(v[i][j + 1]), g[v[i][j + 1]].push_back(v[i][j]);
    }
    for (ll i = 0; i < n; i++)
        dsu[i] = -1;
    for (ll i = 0; i < check.size(); i++)
    for (ll j = 0; j < check.size(); j++)
        if (p[check[i]][check[j]] == 2)
            Union(check[i], check[j]);
    for (ll i = 0; i < n; i++)
        v[i].clear();
    for (ll i = 0; i < n; i++)
        v[repr(i)].push_back(i);
    for (ll i = 0; i < n; i++)
        if (v[i].size() > 2)
        {
            for (ll j = 0; j < v[i].size(); j++)
                ans[v[i][j]][v[i][(j + 1) % v[i].size()]] = ans[v[i][(j + 1) % v[i].size()]][v[i][j]] = 1, g[v[i][j]].push_back(v[i][(j + 1) % v[i].size()]), g[v[i][(j + 1) % v[i].size()]].push_back(v[i][j]);
        }
    for (ll i = 0; i < n; i++)
        dfs(i, i);
    for (ll i = 0; i < n; i++)
    for (ll j = 0; j < n; j++)
        if (cnt[i][j] != p[i][j])
            return false;
    build(ans);
    return true;
}
/*

*/

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:57:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |         for (ll j = 0; j + 1 < v[i].size(); j++)
      |                        ~~~~~~^~~~~~~~~~~~~
supertrees.cpp:62:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for (ll i = 0; i < check.size(); i++)
      |                    ~~^~~~~~~~~~~~~~
supertrees.cpp:63:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for (ll j = 0; j < check.size(); j++)
      |                    ~~^~~~~~~~~~~~~~
supertrees.cpp:73:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |             for (ll j = 0; j < v[i].size(); j++)
      |                            ~~^~~~~~~~~~~~~

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 1 ms 500 KB Output is correct
6 Correct 7 ms 3420 KB Output is correct
7 Correct 163 ms 30032 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 1 ms 500 KB Output is correct
6 Correct 7 ms 3420 KB Output is correct
7 Correct 163 ms 30032 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 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 3420 KB Output is correct
13 Correct 164 ms 29128 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 4 ms 3048 KB Output is correct
17 Correct 83 ms 20304 KB Output is correct
18 Correct 1 ms 548 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 38 ms 10092 KB Output is correct
21 Correct 155 ms 30136 KB Output is correct
22 Correct 165 ms 29844 KB Output is correct
23 Correct 165 ms 30016 KB Output is correct
24 Correct 159 ms 29172 KB Output is correct
25 Correct 64 ms 20048 KB Output is correct
26 Correct 62 ms 19768 KB Output is correct
27 Correct 171 ms 29996 KB Output is correct
28 Correct 156 ms 29116 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 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 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 7 ms 3420 KB Output is correct
9 Correct 166 ms 31152 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 171 ms 32084 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 5 ms 3084 KB Output is correct
17 Correct 90 ms 22184 KB Output is correct
18 Correct 1 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 39 ms 10652 KB Output is correct
22 Correct 156 ms 32084 KB Output is correct
23 Correct 155 ms 32080 KB Output is correct
24 Correct 168 ms 32080 KB Output is correct
25 Correct 63 ms 21332 KB Output is correct
26 Correct 72 ms 22360 KB Output is correct
27 Correct 153 ms 31960 KB Output is correct
28 Correct 169 ms 32080 KB Output is correct
29 Correct 63 ms 21328 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 39 ms 10536 KB Output is correct
5 Correct 155 ms 32044 KB Output is correct
6 Correct 157 ms 31824 KB Output is correct
7 Correct 165 ms 31916 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 41 ms 10540 KB Output is correct
10 Correct 188 ms 31948 KB Output is correct
11 Correct 179 ms 31824 KB Output is correct
12 Correct 168 ms 32080 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 0 ms 472 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 40 ms 10544 KB Output is correct
17 Correct 167 ms 32108 KB Output is correct
18 Correct 165 ms 32048 KB Output is correct
19 Correct 174 ms 32044 KB Output is correct
20 Correct 154 ms 31252 KB Output is correct

Subtask #5
21.0 / 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 1 ms 500 KB Output is correct
6 Correct 7 ms 3420 KB Output is correct
7 Correct 163 ms 30032 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 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 3420 KB Output is correct
13 Correct 164 ms 29128 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 4 ms 3048 KB Output is correct
17 Correct 83 ms 20304 KB Output is correct
18 Correct 1 ms 548 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 38 ms 10092 KB Output is correct
21 Correct 155 ms 30136 KB Output is correct
22 Correct 165 ms 29844 KB Output is correct
23 Correct 165 ms 30016 KB Output is correct
24 Correct 159 ms 29172 KB Output is correct
25 Correct 64 ms 20048 KB Output is correct
26 Correct 62 ms 19768 KB Output is correct
27 Correct 171 ms 29996 KB Output is correct
28 Correct 156 ms 29116 KB Output is correct
29 Correct 0 ms 348 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 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 7 ms 3420 KB Output is correct
37 Correct 166 ms 31152 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 8 ms 3416 KB Output is correct
41 Correct 171 ms 32084 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 5 ms 3084 KB Output is correct
45 Correct 90 ms 22184 KB Output is correct
46 Correct 1 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 39 ms 10652 KB Output is correct
50 Correct 156 ms 32084 KB Output is correct
51 Correct 155 ms 32080 KB Output is correct
52 Correct 168 ms 32080 KB Output is correct
53 Correct 63 ms 21332 KB Output is correct
54 Correct 72 ms 22360 KB Output is correct
55 Correct 153 ms 31960 KB Output is correct
56 Correct 169 ms 32080 KB Output is correct
57 Correct 63 ms 21328 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 1 ms 344 KB Output is correct
60 Correct 4 ms 3016 KB Output is correct
61 Correct 81 ms 22176 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 0 ms 468 KB Output is correct
64 Correct 1 ms 344 KB Output is correct
65 Correct 49 ms 10576 KB Output is correct
66 Correct 66 ms 22184 KB Output is correct
67 Correct 65 ms 22056 KB Output is correct
68 Correct 65 ms 22048 KB Output is correct
69 Correct 63 ms 21284 KB Output is correct

Subtask #6
4.0 / 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 1 ms 500 KB Output is correct
6 Correct 7 ms 3420 KB Output is correct
7 Correct 163 ms 30032 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 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 3420 KB Output is correct
13 Correct 164 ms 29128 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 4 ms 3048 KB Output is correct
17 Correct 83 ms 20304 KB Output is correct
18 Correct 1 ms 548 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 38 ms 10092 KB Output is correct
21 Correct 155 ms 30136 KB Output is correct
22 Correct 165 ms 29844 KB Output is correct
23 Correct 165 ms 30016 KB Output is correct
24 Correct 159 ms 29172 KB Output is correct
25 Correct 64 ms 20048 KB Output is correct
26 Correct 62 ms 19768 KB Output is correct
27 Correct 171 ms 29996 KB Output is correct
28 Correct 156 ms 29116 KB Output is correct
29 Correct 0 ms 348 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 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 7 ms 3420 KB Output is correct
37 Correct 166 ms 31152 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 8 ms 3416 KB Output is correct
41 Correct 171 ms 32084 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 5 ms 3084 KB Output is correct
45 Correct 90 ms 22184 KB Output is correct
46 Correct 1 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 39 ms 10652 KB Output is correct
50 Correct 156 ms 32084 KB Output is correct
51 Correct 155 ms 32080 KB Output is correct
52 Correct 168 ms 32080 KB Output is correct
53 Correct 63 ms 21332 KB Output is correct
54 Correct 72 ms 22360 KB Output is correct
55 Correct 153 ms 31960 KB Output is correct
56 Correct 169 ms 32080 KB Output is correct
57 Correct 63 ms 21328 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 39 ms 10536 KB Output is correct
62 Correct 155 ms 32044 KB Output is correct
63 Correct 157 ms 31824 KB Output is correct
64 Correct 165 ms 31916 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 41 ms 10540 KB Output is correct
67 Correct 188 ms 31948 KB Output is correct
68 Correct 179 ms 31824 KB Output is correct
69 Correct 168 ms 32080 KB Output is correct
70 Correct 1 ms 604 KB Output is correct
71 Correct 0 ms 472 KB Output is correct
72 Correct 1 ms 348 KB Output is correct
73 Correct 40 ms 10544 KB Output is correct
74 Correct 167 ms 32108 KB Output is correct
75 Correct 165 ms 32048 KB Output is correct
76 Correct 174 ms 32044 KB Output is correct
77 Correct 154 ms 31252 KB Output is correct
78 Correct 0 ms 344 KB Output is correct
79 Correct 1 ms 344 KB Output is correct
80 Correct 4 ms 3016 KB Output is correct
81 Correct 81 ms 22176 KB Output is correct
82 Correct 1 ms 348 KB Output is correct
83 Correct 0 ms 468 KB Output is correct
84 Correct 1 ms 344 KB Output is correct
85 Correct 49 ms 10576 KB Output is correct
86 Correct 66 ms 22184 KB Output is correct
87 Correct 65 ms 22056 KB Output is correct
88 Correct 65 ms 22048 KB Output is correct
89 Correct 63 ms 21284 KB Output is correct
90 Correct 1 ms 348 KB Output is correct
91 Correct 0 ms 468 KB Output is correct
92 Correct 3 ms 860 KB Output is correct
93 Correct 61 ms 14108 KB Output is correct
94 Correct 0 ms 344 KB Output is correct
95 Correct 1 ms 348 KB Output is correct
96 Correct 0 ms 348 KB Output is correct
97 Correct 15 ms 3932 KB Output is correct
98 Correct 69 ms 14248 KB Output is correct
99 Correct 79 ms 14116 KB Output is correct
100 Correct 60 ms 14252 KB Output is correct
101 Correct 62 ms 14260 KB Output is correct
102 Correct 91 ms 14164 KB Output is correct
103 Correct 67 ms 14164 KB Output is correct
104 Correct 59 ms 14160 KB Output is correct
105 Correct 70 ms 14164 KB Output is correct