oj.uz

Submission #788276

# Submission time Handle Problem Language Result Execution time Memory
788276 2023-07-20T04:30:16 Z mannshah1211 Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 158 ms 22348 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;



void build(vector<vector<int>> b);

struct DSU {
	vector<int> link, siz;
	DSU (int n) : link(n), siz(n, 1) {
		iota(link.begin(), link.end(), 0ll);
	}
	
	int get(int x) {
		if (link[x] == x) {
			return x;
		}
		return link[x] = get(link[x]);
	}
	
	bool unite(int a, int b) {
	   a = get(a), b = get(b);
	   if (a == b) {
	   	return false;
	   }
	   
	   if (siz[a] < siz[b]) {
	   	swap(a, b);
	   }
	   link[b] = a;
	   siz[a] += siz[b];
	   return true;
	}
	
	bool same(int a, int b) {
		return (get(a) == get(b));
	}
	
};

int construct(vector<vector<int>> p) {
	vector<vector<int>> b(p.size(), vector<int>(p.size()));
	DSU ds(p.size());
	for (int i = 0; i < p.size(); i++) {
		for (int j = i + 1; j < p.size(); j++) {
			if (p[i][j] != 0) {
				ds.unite(i, j);
			}
		}
	}
	
	for (int i = 0; i < p.size(); i++) {
		for (int j = i + 1; j < p.size(); j++) {
			if (p[i][j] == 0 && ds.same(i, j)) {
				return 0;
			} else if (p[i][j] == 1 && !ds.same(i, j)) {
				return 0;
			}
		}
	}
	
	vector<vector<int>> conncomps(p.size());
	for (int i = 0; i < p.size(); i++) {
		conncomps[ds.get(i)].push_back(i);
	}
	
	for (int i = 0; i < conncomps.size(); i++) {
		for (int j = 0; j < (int) conncomps[i].size() - 1; j++) {
			b[conncomps[i][j]][conncomps[i][j + 1]] = 1;
			b[conncomps[i][j + 1]][conncomps[i][j]] = 1;
		}
	}
	
	build(b);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:45:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
supertrees.cpp:46:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |   for (int j = i + 1; j < p.size(); j++) {
      |                       ~~^~~~~~~~~~
supertrees.cpp:53:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
supertrees.cpp:54:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |   for (int j = i + 1; j < p.size(); j++) {
      |                       ~~^~~~~~~~~~
supertrees.cpp:64:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
supertrees.cpp:68:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |  for (int i = 0; i < conncomps.size(); 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 6 ms 1108 KB Output is correct
7 Correct 147 ms 22068 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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 6 ms 1108 KB Output is correct
7 Correct 147 ms 22068 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 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 1236 KB Output is correct
13 Correct 146 ms 22284 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 304 KB Output is correct
16 Correct 3 ms 864 KB Output is correct
17 Correct 70 ms 12320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 300 KB Output is correct
20 Correct 37 ms 5828 KB Output is correct
21 Correct 149 ms 22336 KB Output is correct
22 Correct 151 ms 22348 KB Output is correct
23 Correct 156 ms 22316 KB Output is correct
24 Correct 158 ms 22300 KB Output is correct
25 Correct 61 ms 12300 KB Output is correct
26 Correct 60 ms 12344 KB Output is correct
27 Correct 153 ms 22240 KB Output is correct
28 Correct 153 ms 22300 KB Output is correct

Subtask #3
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 308 KB Output is correct
4 Incorrect 1 ms 296 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 1 ms 340 KB Output is correct
2 Incorrect 1 ms 300 KB Too few ways to get from 0 to 1, should be 2 found 1
3 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 6 ms 1108 KB Output is correct
7 Correct 147 ms 22068 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 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 1236 KB Output is correct
13 Correct 146 ms 22284 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 304 KB Output is correct
16 Correct 3 ms 864 KB Output is correct
17 Correct 70 ms 12320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 300 KB Output is correct
20 Correct 37 ms 5828 KB Output is correct
21 Correct 149 ms 22336 KB Output is correct
22 Correct 151 ms 22348 KB Output is correct
23 Correct 156 ms 22316 KB Output is correct
24 Correct 158 ms 22300 KB Output is correct
25 Correct 61 ms 12300 KB Output is correct
26 Correct 60 ms 12344 KB Output is correct
27 Correct 153 ms 22240 KB Output is correct
28 Correct 153 ms 22300 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 308 KB Output is correct
32 Incorrect 1 ms 296 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 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 6 ms 1108 KB Output is correct
7 Correct 147 ms 22068 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 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 1236 KB Output is correct
13 Correct 146 ms 22284 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 304 KB Output is correct
16 Correct 3 ms 864 KB Output is correct
17 Correct 70 ms 12320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 300 KB Output is correct
20 Correct 37 ms 5828 KB Output is correct
21 Correct 149 ms 22336 KB Output is correct
22 Correct 151 ms 22348 KB Output is correct
23 Correct 156 ms 22316 KB Output is correct
24 Correct 158 ms 22300 KB Output is correct
25 Correct 61 ms 12300 KB Output is correct
26 Correct 60 ms 12344 KB Output is correct
27 Correct 153 ms 22240 KB Output is correct
28 Correct 153 ms 22300 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 308 KB Output is correct
32 Incorrect 1 ms 296 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -