oj.uz

Submission #829561

# Submission time Handle Problem Language Result Execution time Memory
829561 2023-08-18T12:54:33 Z faruk Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 181 ms 24084 KB 
#include "supertrees.h"
#include <iostream>
#include <vector>
#include <algorithm>
#define mp make_pair
#define all(a) a.begin(), a.end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

int n;
bool check_components(vector<vector<int> > p) {
	vector<int> comp(n, -1);
	for (int i = 0; i < n; i++) {
		if (p[i][i] != 1)
			return false;
		if (comp[i] == -1) {
			for (int j = 0; j < n; j++) {
				if (p[i][j] != 0 and comp[j] != -1)
					return false;
				if (p[i][j])
					comp[j] = i;
			}
		}
		else {
			for (int j = 0; j < n; j++)
				if (p[i][j] != 0 and comp[j] != comp[i])
					return false;
		}
	}
	return true;
}

int construct(std::vector<std::vector<int>> p) {
	n = p.size();
	std::vector<std::vector<int>> answer;
	if (check_components(p) == false)
		return 0;
	vector<bool> visited(n);
	vector<vector<int> > out(n, vector<int>(n, 0));
	for (int i = 0; i < n; i++) {
		if (visited[i])
			continue;
		vector<int> mine;
		for (int j = 0; j < n; j++)
			if (p[i][j] != 0)
				mine.push_back(j), visited[j] = true;
		if (mine.size() == 1)
			continue;

		vector<int> all2, everyone_else;
		for (int a : mine) {
			bool has1 = false;
			for (int j : mine)
				if (p[a][j] == 1 and j != a)
					has1 = true;
			if (has1)
				everyone_else.push_back(a);
			else
				all2.push_back(a);
		}
		for (int a : everyone_else) {
			for (int b : all2)
				if (p[a][b] != 2)
					return 0;
			for (int b : everyone_else)
				if (p[a][b] != 1)
					return 0;
		}

		if (everyone_else.size() == 0) { // cycle
			for (int i = 0; i < all2.size(); i++)
			{
				int f = all2[i], s = i < (all2.size() - 1) ? all2[i + 1] : all2[0];
				out[f][s] = 1, out[s][f] = 1;
			}
		}
		else if (all2.size() == 0) {// line
			for (int i = 0; i < everyone_else.size() - 1; i++)
			{
				int f = everyone_else[i], s = everyone_else[i + 1];
				out[f][s] = 1, out[s][f] = 1;
			}
		}
		else {
			// made cycle chain
			for (int i = 0; i < all2.size() - 1; i++)
			{
				int f = all2[i], s = all2[i + 1];
				out[f][s] = 1, out[s][f] = 1;
			}

			// made one chain
			for (int i = 0; i < everyone_else.size() - 1; i++)
			{
				int f = everyone_else[i], s = everyone_else[i + 1];
				out[f][s] = 1, out[s][f] = 1;
			}

			int A = everyone_else[0], B = all2[0], C = all2.back();
			out[A][B] = 1;
			out[B][A] = 1;
			out[A][C] = 1;
			out[C][A] = 1;
		}
	}
	build(out);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:74:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |    for (int i = 0; i < all2.size(); i++)
      |                    ~~^~~~~~~~~~~~~
supertrees.cpp:76:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |     int f = all2[i], s = i < (all2.size() - 1) ? all2[i + 1] : all2[0];
      |                          ~~^~~~~~~~~~~~~~~~~~~
supertrees.cpp:81:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |    for (int i = 0; i < everyone_else.size() - 1; i++)
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:89:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |    for (int i = 0; i < all2.size() - 1; i++)
      |                    ~~^~~~~~~~~~~~~~~~~
supertrees.cpp:96:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |    for (int i = 0; i < everyone_else.size() - 1; i++)
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 6 ms 1236 KB Output is correct
7 Correct 181 ms 23936 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 6 ms 1236 KB Output is correct
7 Correct 181 ms 23936 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 304 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1204 KB Output is correct
13 Correct 151 ms 23940 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 63 ms 14072 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 300 KB Output is correct
20 Correct 49 ms 6140 KB Output is correct
21 Correct 164 ms 23932 KB Output is correct
22 Correct 149 ms 23968 KB Output is correct
23 Correct 157 ms 23964 KB Output is correct
24 Correct 150 ms 23952 KB Output is correct
25 Correct 67 ms 14080 KB Output is correct
26 Correct 62 ms 14068 KB Output is correct
27 Correct 158 ms 23944 KB Output is correct
28 Correct 151 ms 23932 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 41 ms 6216 KB Output is correct
5 Correct 150 ms 23944 KB Output is correct
6 Correct 155 ms 24084 KB Output is correct
7 Correct 155 ms 23952 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 37 ms 6160 KB Output is correct
10 Correct 152 ms 24080 KB Output is correct
11 Correct 148 ms 23952 KB Output is correct
12 Correct 156 ms 23940 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Incorrect 16 ms 3732 KB Answer gives possible 0 while actual possible 1
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 6 ms 1236 KB Output is correct
7 Correct 181 ms 23936 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 304 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1204 KB Output is correct
13 Correct 151 ms 23940 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 63 ms 14072 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 300 KB Output is correct
20 Correct 49 ms 6140 KB Output is correct
21 Correct 164 ms 23932 KB Output is correct
22 Correct 149 ms 23968 KB Output is correct
23 Correct 157 ms 23964 KB Output is correct
24 Correct 150 ms 23952 KB Output is correct
25 Correct 67 ms 14080 KB Output is correct
26 Correct 62 ms 14068 KB Output is correct
27 Correct 158 ms 23944 KB Output is correct
28 Correct 151 ms 23932 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 6 ms 1236 KB Output is correct
7 Correct 181 ms 23936 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 304 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1204 KB Output is correct
13 Correct 151 ms 23940 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 63 ms 14072 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 300 KB Output is correct
20 Correct 49 ms 6140 KB Output is correct
21 Correct 164 ms 23932 KB Output is correct
22 Correct 149 ms 23968 KB Output is correct
23 Correct 157 ms 23964 KB Output is correct
24 Correct 150 ms 23952 KB Output is correct
25 Correct 67 ms 14080 KB Output is correct
26 Correct 62 ms 14068 KB Output is correct
27 Correct 158 ms 23944 KB Output is correct
28 Correct 151 ms 23932 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -