oj.uz

Submission #569741

# Submission time Handle Problem Language Result Execution time Memory
569741 2022-05-27T17:20:11 Z ngpin04 Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 255 ms 31820 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define TASK ""
#define bit(x) (1LL << (x))
#define getbit(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end() 
using namespace std;
template <typename T1, typename T2> bool mini(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maxi(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}
mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());

int rand(int l, int r) {
	return l + rd() % (r - l + 1);
}
const int N = 1e3 + 5;
const int oo = 1e9;
const long long ooo = 1e18;
const int mod = 1e9 + 7; // 998244353;
const long double pi = acos(-1);

vector <int> s[N];

int ans[N][N];
int a[N][N];
int c[N];
int n,comp;

bool vis[N];

int solve() {
	for (int i = 0; i < n; i++) if (!vis[i]) {
		queue <int> q({i});
		vis[i] = true;
		while (q.size()) {
			int u = q.front(); q.pop();
			s[comp].push_back(u);
			c[u] = comp;
			for (int v = 0; v < n; v++) if (a[u][v] > 0) {
				if (!vis[v]) {
					q.push(v);
					vis[v] = true;
				}
			}
		}
		comp++;
	}

	for (int i = 0; i < n; i++)
	for (int j = 0; j < n; j++)
		if (a[i][j] == 3)
			return 0;

	for (int i = 0; i < n; i++)
		vis[i] = 0;

	for (int i = 0; i < comp; i++) {
		for (int j : s[i]) 
		for (int k = 0; k < n; k++) {
			if (c[j] == c[k] && a[j][k] == 0)
				return 0;
			if (c[j] != c[k] && a[j][k] > 0)
				return 0;
		}

		vector <int> cir;
		for (int j : s[i]) if (!vis[j]) {
			int ok = true;
			vector <int> tree;
			for (int k : s[i]) 
				if (a[j][k] == 1)
					tree.push_back(k);

			for (int x : tree)
				vis[x] = true;

			for (int it = 0; it + 1 < (int) tree.size(); it++) {
				int u = tree[it];
				int v = tree[it + 1];
				ans[u][v] = ans[v][u] = 1;
			}

			for (int x : tree)
			for (int y : s[i]) 
				if (!vis[y] && a[x][y] != 2)
					return 0;

			cir.push_back(tree.back());
		}

		if (cir.size() == 2)
			return 0;

		if (cir.size() == 1)
			continue;
		
		for (int j = 0; j < (int) cir.size(); j++) {
			int u = cir[j];
			int v = cir[(j + 1) % cir.size()];
			ans[u][v] = ans[v][u] = 1;
		}
	}

	return 1;
}

int construct(vector<vector<int>> p) {
	n = p.size();
	for (int i = 0; i < n; i++)
	for (int j = 0; j < n; j++)
		a[i][j] = p[i][j];

	int res = solve();

	if (!res)
		return 0;
	vector<vector<int>> answer;
	for (int i = 0; i < n; i++) {
		vector<int> row;
		for (int j = 0; j < n; j++)
			row.push_back(ans[i][j]);
		answer.push_back(row);
	}
	build(answer);
	return res;
}

//#include "grader.cpp"

Compilation message

supertrees.cpp: In function 'int solve()':
supertrees.cpp:74:8: warning: unused variable 'ok' [-Wunused-variable]
   74 |    int ok = true;
      |        ^~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 9 ms 2836 KB Output is correct
7 Correct 207 ms 29964 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 9 ms 2836 KB Output is correct
7 Correct 207 ms 29964 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 13 ms 2032 KB Output is correct
13 Correct 202 ms 26156 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1444 KB Output is correct
17 Correct 85 ms 12068 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 60 ms 9536 KB Output is correct
21 Correct 206 ms 29900 KB Output is correct
22 Correct 191 ms 29488 KB Output is correct
23 Correct 236 ms 29856 KB Output is correct
24 Correct 191 ms 26244 KB Output is correct
25 Correct 82 ms 14116 KB Output is correct
26 Correct 99 ms 12492 KB Output is correct
27 Correct 187 ms 29876 KB Output is correct
28 Correct 201 ms 26280 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 9 ms 2004 KB Output is correct
9 Correct 198 ms 26032 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 8 ms 2772 KB Output is correct
13 Correct 183 ms 29944 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 7 ms 1364 KB Output is correct
17 Correct 85 ms 12084 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 47 ms 9588 KB Output is correct
22 Correct 187 ms 29884 KB Output is correct
23 Correct 196 ms 29876 KB Output is correct
24 Correct 198 ms 29876 KB Output is correct
25 Correct 107 ms 12364 KB Output is correct
26 Correct 73 ms 12876 KB Output is correct
27 Correct 219 ms 29924 KB Output is correct
28 Correct 202 ms 29932 KB Output is correct
29 Correct 76 ms 12328 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 52 ms 9548 KB Output is correct
5 Correct 186 ms 29872 KB Output is correct
6 Correct 196 ms 29488 KB Output is correct
7 Correct 201 ms 29892 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 46 ms 9612 KB Output is correct
10 Correct 216 ms 30000 KB Output is correct
11 Correct 181 ms 29908 KB Output is correct
12 Correct 255 ms 29936 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 49 ms 9588 KB Output is correct
17 Correct 178 ms 31820 KB Output is correct
18 Correct 204 ms 31736 KB Output is correct
19 Correct 199 ms 31756 KB Output is correct
20 Correct 209 ms 28172 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 9 ms 2836 KB Output is correct
7 Correct 207 ms 29964 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 13 ms 2032 KB Output is correct
13 Correct 202 ms 26156 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1444 KB Output is correct
17 Correct 85 ms 12068 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 60 ms 9536 KB Output is correct
21 Correct 206 ms 29900 KB Output is correct
22 Correct 191 ms 29488 KB Output is correct
23 Correct 236 ms 29856 KB Output is correct
24 Correct 191 ms 26244 KB Output is correct
25 Correct 82 ms 14116 KB Output is correct
26 Correct 99 ms 12492 KB Output is correct
27 Correct 187 ms 29876 KB Output is correct
28 Correct 201 ms 26280 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 9 ms 2004 KB Output is correct
37 Correct 198 ms 26032 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 8 ms 2772 KB Output is correct
41 Correct 183 ms 29944 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 7 ms 1364 KB Output is correct
45 Correct 85 ms 12084 KB Output is correct
46 Correct 0 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 47 ms 9588 KB Output is correct
50 Correct 187 ms 29884 KB Output is correct
51 Correct 196 ms 29876 KB Output is correct
52 Correct 198 ms 29876 KB Output is correct
53 Correct 107 ms 12364 KB Output is correct
54 Correct 73 ms 12876 KB Output is correct
55 Correct 219 ms 29924 KB Output is correct
56 Correct 202 ms 29932 KB Output is correct
57 Correct 76 ms 12328 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 4 ms 1364 KB Output is correct
61 Correct 83 ms 12076 KB Output is correct
62 Correct 0 ms 340 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 1 ms 340 KB Output is correct
65 Correct 49 ms 9584 KB Output is correct
66 Correct 74 ms 14484 KB Output is correct
67 Correct 101 ms 15776 KB Output is correct
68 Correct 100 ms 14492 KB Output is correct
69 Correct 78 ms 14104 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 9 ms 2836 KB Output is correct
7 Correct 207 ms 29964 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 13 ms 2032 KB Output is correct
13 Correct 202 ms 26156 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1444 KB Output is correct
17 Correct 85 ms 12068 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 60 ms 9536 KB Output is correct
21 Correct 206 ms 29900 KB Output is correct
22 Correct 191 ms 29488 KB Output is correct
23 Correct 236 ms 29856 KB Output is correct
24 Correct 191 ms 26244 KB Output is correct
25 Correct 82 ms 14116 KB Output is correct
26 Correct 99 ms 12492 KB Output is correct
27 Correct 187 ms 29876 KB Output is correct
28 Correct 201 ms 26280 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 9 ms 2004 KB Output is correct
37 Correct 198 ms 26032 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 8 ms 2772 KB Output is correct
41 Correct 183 ms 29944 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 7 ms 1364 KB Output is correct
45 Correct 85 ms 12084 KB Output is correct
46 Correct 0 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 47 ms 9588 KB Output is correct
50 Correct 187 ms 29884 KB Output is correct
51 Correct 196 ms 29876 KB Output is correct
52 Correct 198 ms 29876 KB Output is correct
53 Correct 107 ms 12364 KB Output is correct
54 Correct 73 ms 12876 KB Output is correct
55 Correct 219 ms 29924 KB Output is correct
56 Correct 202 ms 29932 KB Output is correct
57 Correct 76 ms 12328 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 52 ms 9548 KB Output is correct
62 Correct 186 ms 29872 KB Output is correct
63 Correct 196 ms 29488 KB Output is correct
64 Correct 201 ms 29892 KB Output is correct
65 Correct 0 ms 340 KB Output is correct
66 Correct 46 ms 9612 KB Output is correct
67 Correct 216 ms 30000 KB Output is correct
68 Correct 181 ms 29908 KB Output is correct
69 Correct 255 ms 29936 KB Output is correct
70 Correct 1 ms 340 KB Output is correct
71 Correct 0 ms 340 KB Output is correct
72 Correct 0 ms 340 KB Output is correct
73 Correct 49 ms 9588 KB Output is correct
74 Correct 178 ms 31820 KB Output is correct
75 Correct 204 ms 31736 KB Output is correct
76 Correct 199 ms 31756 KB Output is correct
77 Correct 209 ms 28172 KB Output is correct
78 Correct 0 ms 340 KB Output is correct
79 Correct 1 ms 340 KB Output is correct
80 Correct 4 ms 1364 KB Output is correct
81 Correct 83 ms 12076 KB Output is correct
82 Correct 0 ms 340 KB Output is correct
83 Correct 1 ms 340 KB Output is correct
84 Correct 1 ms 340 KB Output is correct
85 Correct 49 ms 9584 KB Output is correct
86 Correct 74 ms 14484 KB Output is correct
87 Correct 101 ms 15776 KB Output is correct
88 Correct 100 ms 14492 KB Output is correct
89 Correct 78 ms 14104 KB Output is correct
90 Correct 1 ms 332 KB Output is correct
91 Correct 1 ms 332 KB Output is correct
92 Correct 4 ms 1492 KB Output is correct
93 Correct 103 ms 14100 KB Output is correct
94 Correct 1 ms 332 KB Output is correct
95 Correct 1 ms 340 KB Output is correct
96 Correct 1 ms 340 KB Output is correct
97 Correct 30 ms 4756 KB Output is correct
98 Correct 94 ms 14100 KB Output is correct
99 Correct 98 ms 14104 KB Output is correct
100 Correct 85 ms 14120 KB Output is correct
101 Correct 76 ms 14028 KB Output is correct
102 Correct 70 ms 14104 KB Output is correct
103 Correct 73 ms 14028 KB Output is correct
104 Correct 78 ms 14100 KB Output is correct
105 Correct 126 ms 14116 KB Output is correct