oj.uz

Submission #829613

# Submission time Handle Problem Language Result Execution time Memory
829613 2023-08-18T13:21:56 Z faruk Connecting Supertrees (IOI20_supertrees) C++17
11 / 100
 200 ms 22644 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] != 0)
					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();
	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
			if (all2.size() <= 2)
				return 0;
			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;
			}
			/*if (all2.size() == 1)
				return 0;*/

			// 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:75:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |    for (int i = 0; i < all2.size(); i++)
      |                    ~~^~~~~~~~~~~~~
supertrees.cpp:77:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     int f = all2[i], s = i < (all2.size() - 1) ? all2[i + 1] : all2[0];
      |                          ~~^~~~~~~~~~~~~~~~~~~
supertrees.cpp:82:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |    for (int i = 0; i < everyone_else.size() - 1; i++)
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:90:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |    for (int i = 0; i < all2.size() - 1; i++)
      |                    ~~^~~~~~~~~~~~~~~~~
supertrees.cpp:99:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |    for (int i = 0; i < everyone_else.size() - 1; i++)
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 11 ms 1124 KB Output is correct
7 Correct 148 ms 22044 KB Output is correct

Subtask #2
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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 11 ms 1124 KB Output is correct
7 Correct 148 ms 22044 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 212 KB Output is correct
11 Correct 0 ms 284 KB Output is correct
12 Correct 6 ms 1108 KB Output is correct
13 Correct 149 ms 21964 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 72 ms 12032 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
20 Halted 0 ms 0 KB -

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 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 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 1276 KB Output is correct
9 Correct 200 ms 22644 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 296 KB Output is correct
12 Correct 8 ms 1236 KB Output is correct
13 Correct 160 ms 22568 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 824 KB Output is correct
17 Correct 69 ms 12648 KB Output is correct
18 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
19 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 47 ms 5652 KB Output is correct
5 Correct 168 ms 22052 KB Output is correct
6 Correct 153 ms 21972 KB Output is correct
7 Correct 169 ms 21980 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 47 ms 5728 KB Output is correct
10 Correct 159 ms 21968 KB Output is correct
11 Correct 161 ms 22000 KB Output is correct
12 Correct 171 ms 21948 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 37 ms 5780 KB Too few ways to get from 0 to 24, should be 2 found 1
17 Halted 0 ms 0 KB -

Subtask #5
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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 11 ms 1124 KB Output is correct
7 Correct 148 ms 22044 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 212 KB Output is correct
11 Correct 0 ms 284 KB Output is correct
12 Correct 6 ms 1108 KB Output is correct
13 Correct 149 ms 21964 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 72 ms 12032 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
20 Halted 0 ms 0 KB -

Subtask #6
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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 11 ms 1124 KB Output is correct
7 Correct 148 ms 22044 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 212 KB Output is correct
11 Correct 0 ms 284 KB Output is correct
12 Correct 6 ms 1108 KB Output is correct
13 Correct 149 ms 21964 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 724 KB Output is correct
17 Correct 72 ms 12032 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
20 Halted 0 ms 0 KB -