oj.uz

Submission #422980

# Submission time Handle Problem Language Result Execution time Memory
422980 2021-06-10T15:14:07 Z albertolg101 Simurgh (IOI17_simurgh) C++17
0 / 100
 1 ms 204 KB 
#include <bits/stdc++.h>
#include "simurgh.h"

using namespace std;
using pii = pair<int, int>;

std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	
	vector<vector<int>> g(n, vector<int> (n));

	for(int i = 0 ; i < n ; i++)
	{
		int a = u[i], b = v[i];
		g[a][b] = g[b][a] = i;
	}

	int nextNod = 0;
	vector<int> vans, perm(n);

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

	function<void(int)> dfs = [&](int nod)
	{
		nextNod++;

		if(nextNod < perm.size() and g[nod][perm[nextNod]] != -1)
		{
			vans.push_back(g[nod][perm[nextNod]]);
			dfs(perm[nextNod]);
		}
	};

	do
	{
		vans.clear();
		nextNod = 0;
		dfs(perm[0]);
		if(count_common_roads(vans) == n - 1)
			return vans;

	} while(next_permutation(perm.begin(), perm.end()));
}

Compilation message

simurgh.cpp: In lambda function:
simurgh.cpp:27:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |   if(nextNod < perm.size() and g[nod][perm[nextNod]] != -1)
      |      ~~~~~~~~^~~~~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:9:42: warning: control reaches end of non-void function [-Wreturn-type]
    9 |  vector<vector<int>> g(n, vector<int> (n));
      |                                          ^

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB WA in grader: NO
2 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB WA in grader: NO
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB WA in grader: NO
2 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Incorrect 1 ms 204 KB WA in grader: NO
3 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB WA in grader: NO
2 Halted 0 ms 0 KB -