oj.uz

Submission #777816

# Submission time Handle Problem Language Result Execution time Memory
777816 2023-07-09T16:52:27 Z Minindu206 Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 181 ms 22524 KB 
#include "supertrees.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
struct DSU
{
	int n;
	vector<int> par, sz;
	void init(int _n)
	{
		n = _n;
		par.resize(n + 1, -1);
		sz.resize(n + 1, 0);
	}
	int finds(int a)
	{
		if (par[a] == -1)
			return a;
		return par[a] = finds(par[a]);
	}
	void unites(int a, int b)
	{
		int x = finds(a);
		int y = finds(b);
		if (x != y)
		{
			if (sz[x] < sz[y])
				swap(x, y);
			par[y] = x;
			sz[x] += sz[y];
		}
	}
};
int construct(std::vector<std::vector<int>> p)
{
	int n = p.size();
	DSU d;
	d.init(n);
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < n; j++)
		{
			if (i == j)
				continue;
			if (p[i][j] == 3)
				return 0;
			if (p[i][j])
				d.unites(i, j);
		}
	}
	map<int, vector<int>> mp;
	for (int i = 0; i < n; i++)
	{
		mp[d.finds(i)].push_back(i);
		for (int j = 0; j < n; j++)
		{
			if (i == j)
				continue;
			if (p[i][j] == 0)
				if (d.finds(i) == d.finds(j))
					return 0;
		}
	}
	vector<vector<int>> ans(n, vector<int>(n, 0));
	for (auto a : mp)
	{
		if (a.second.size() == 1)
			continue;
		int csz = a.second.size();
		vector<int> vis(n, 0), cyc;
		for (auto b : a.second)
		{
			if (vis[b])
				continue;
			cyc.push_back(b);
			vis[b] = 1;
			for (auto c : a.second)
			{
				if (vis[c] == 1)
					continue;
				if (p[b][c] == 1)
				{
					vis[c] = 1;
					ans[b][c] = 1;
					ans[c][b] = 1;
				}
			}
		}
		if (cyc.size() == 2)
			return 0;
		int st = -1;
		for (auto b : cyc)
		{
			if (st == -1)
				st = b;
			else
			{
				ans[st][b] = 1;
				ans[b][st] = 1;
				st = b;
			}
		}
		if (cyc.size() > 2)
		{
			ans[st][cyc[0]] = 1;
			ans[cyc[0]][st] = 1;
		}
	}
	build(ans);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:69:7: warning: unused variable 'csz' [-Wunused-variable]
   69 |   int csz = a.second.size();
      |       ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 9 ms 1204 KB Output is correct
7 Correct 159 ms 22440 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 9 ms 1204 KB Output is correct
7 Correct 159 ms 22440 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1236 KB Output is correct
13 Correct 168 ms 22512 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 596 KB Output is correct
17 Correct 73 ms 8500 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 42 ms 6144 KB Output is correct
21 Correct 178 ms 22372 KB Output is correct
22 Correct 181 ms 22424 KB Output is correct
23 Correct 167 ms 22408 KB Output is correct
24 Correct 159 ms 22464 KB Output is correct
25 Correct 66 ms 8552 KB Output is correct
26 Correct 64 ms 8536 KB Output is correct
27 Correct 162 ms 22408 KB Output is correct
28 Correct 160 ms 22472 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 296 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 7 ms 1204 KB Output is correct
9 Correct 159 ms 22524 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1208 KB Output is correct
13 Correct 160 ms 22380 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 668 KB Output is correct
17 Correct 81 ms 8572 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 296 KB Output is correct
21 Correct 40 ms 6152 KB Output is correct
22 Correct 159 ms 22396 KB Output is correct
23 Correct 159 ms 22404 KB Output is correct
24 Correct 165 ms 22400 KB Output is correct
25 Correct 72 ms 12620 KB Output is correct
26 Correct 65 ms 8452 KB Output is correct
27 Correct 162 ms 22420 KB Output is correct
28 Correct 168 ms 22348 KB Output is correct
29 Correct 68 ms 12556 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 41 ms 5984 KB Output is correct
5 Correct 160 ms 22176 KB Output is correct
6 Correct 159 ms 22184 KB Output is correct
7 Correct 161 ms 22148 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 40 ms 5852 KB Output is correct
10 Correct 165 ms 22148 KB Output is correct
11 Correct 164 ms 22148 KB Output is correct
12 Correct 163 ms 22160 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 40 ms 5840 KB Output is correct
17 Correct 163 ms 22312 KB Output is correct
18 Correct 162 ms 22200 KB Output is correct
19 Correct 160 ms 22312 KB Output is correct
20 Correct 164 ms 22364 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 9 ms 1204 KB Output is correct
7 Correct 159 ms 22440 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1236 KB Output is correct
13 Correct 168 ms 22512 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 596 KB Output is correct
17 Correct 73 ms 8500 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 42 ms 6144 KB Output is correct
21 Correct 178 ms 22372 KB Output is correct
22 Correct 181 ms 22424 KB Output is correct
23 Correct 167 ms 22408 KB Output is correct
24 Correct 159 ms 22464 KB Output is correct
25 Correct 66 ms 8552 KB Output is correct
26 Correct 64 ms 8536 KB Output is correct
27 Correct 162 ms 22408 KB Output is correct
28 Correct 160 ms 22472 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 296 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 7 ms 1204 KB Output is correct
37 Correct 159 ms 22524 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1208 KB Output is correct
41 Correct 160 ms 22380 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 3 ms 668 KB Output is correct
45 Correct 81 ms 8572 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 0 ms 296 KB Output is correct
49 Correct 40 ms 6152 KB Output is correct
50 Correct 159 ms 22396 KB Output is correct
51 Correct 159 ms 22404 KB Output is correct
52 Correct 165 ms 22400 KB Output is correct
53 Correct 72 ms 12620 KB Output is correct
54 Correct 65 ms 8452 KB Output is correct
55 Correct 162 ms 22420 KB Output is correct
56 Correct 168 ms 22348 KB Output is correct
57 Correct 68 ms 12556 KB Output is correct
58 Correct 1 ms 300 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 5 ms 596 KB Output is correct
61 Correct 73 ms 8196 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 0 ms 212 KB Output is correct
64 Correct 0 ms 212 KB Output is correct
65 Correct 40 ms 5896 KB Output is correct
66 Correct 66 ms 8340 KB Output is correct
67 Correct 66 ms 8324 KB Output is correct
68 Correct 68 ms 8368 KB Output is correct
69 Correct 70 ms 12440 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 9 ms 1204 KB Output is correct
7 Correct 159 ms 22440 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1236 KB Output is correct
13 Correct 168 ms 22512 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 596 KB Output is correct
17 Correct 73 ms 8500 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 42 ms 6144 KB Output is correct
21 Correct 178 ms 22372 KB Output is correct
22 Correct 181 ms 22424 KB Output is correct
23 Correct 167 ms 22408 KB Output is correct
24 Correct 159 ms 22464 KB Output is correct
25 Correct 66 ms 8552 KB Output is correct
26 Correct 64 ms 8536 KB Output is correct
27 Correct 162 ms 22408 KB Output is correct
28 Correct 160 ms 22472 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 296 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 7 ms 1204 KB Output is correct
37 Correct 159 ms 22524 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1208 KB Output is correct
41 Correct 160 ms 22380 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 3 ms 668 KB Output is correct
45 Correct 81 ms 8572 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 0 ms 296 KB Output is correct
49 Correct 40 ms 6152 KB Output is correct
50 Correct 159 ms 22396 KB Output is correct
51 Correct 159 ms 22404 KB Output is correct
52 Correct 165 ms 22400 KB Output is correct
53 Correct 72 ms 12620 KB Output is correct
54 Correct 65 ms 8452 KB Output is correct
55 Correct 162 ms 22420 KB Output is correct
56 Correct 168 ms 22348 KB Output is correct
57 Correct 68 ms 12556 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 1 ms 212 KB Output is correct
61 Correct 41 ms 5984 KB Output is correct
62 Correct 160 ms 22176 KB Output is correct
63 Correct 159 ms 22184 KB Output is correct
64 Correct 161 ms 22148 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 40 ms 5852 KB Output is correct
67 Correct 165 ms 22148 KB Output is correct
68 Correct 164 ms 22148 KB Output is correct
69 Correct 163 ms 22160 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 0 ms 212 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 40 ms 5840 KB Output is correct
74 Correct 163 ms 22312 KB Output is correct
75 Correct 162 ms 22200 KB Output is correct
76 Correct 160 ms 22312 KB Output is correct
77 Correct 164 ms 22364 KB Output is correct
78 Correct 1 ms 300 KB Output is correct
79 Correct 0 ms 212 KB Output is correct
80 Correct 5 ms 596 KB Output is correct
81 Correct 73 ms 8196 KB Output is correct
82 Correct 1 ms 212 KB Output is correct
83 Correct 0 ms 212 KB Output is correct
84 Correct 0 ms 212 KB Output is correct
85 Correct 40 ms 5896 KB Output is correct
86 Correct 66 ms 8340 KB Output is correct
87 Correct 66 ms 8324 KB Output is correct
88 Correct 68 ms 8368 KB Output is correct
89 Correct 70 ms 12440 KB Output is correct
90 Correct 1 ms 212 KB Output is correct
91 Correct 1 ms 212 KB Output is correct
92 Correct 3 ms 688 KB Output is correct
93 Correct 70 ms 8456 KB Output is correct
94 Correct 0 ms 212 KB Output is correct
95 Correct 1 ms 212 KB Output is correct
96 Correct 1 ms 212 KB Output is correct
97 Correct 16 ms 2360 KB Output is correct
98 Correct 63 ms 8324 KB Output is correct
99 Correct 64 ms 8340 KB Output is correct
100 Correct 65 ms 8352 KB Output is correct
101 Correct 65 ms 8340 KB Output is correct
102 Correct 64 ms 8352 KB Output is correct
103 Correct 65 ms 8336 KB Output is correct
104 Correct 66 ms 8340 KB Output is correct
105 Correct 67 ms 8408 KB Output is correct