oj.uz

Submission #980767

# Submission time Handle Problem Language Result Execution time Memory
980767 2024-05-12T11:25:16 Z fv3 Senior Postmen (BOI14_postmen) C++14
0 / 100
 12 ms 41308 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
vector<int> adj[500000];
int start[500000];
unordered_set<int> c[500000];
vector<int> ep;
 
void euler(int index, int last)
{
	c[last].insert(index);
	c[index].insert(last);
 
	for (int i = start[i]; i < adj[index].size(); i++)
	{
		start[i]++;
		int node = adj[index][i];
		
		if (!c[node].count(index) && !c[index].count(node))
			euler(node, index);
	}
	ep.push_back(index);
}

int main()
{
	int N, M; cin >> N >> M; 
	for (int i = 0; i < M; i++)
	{
		int a, b;
		cin >> a >> b;
		a--; b--;
 
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
 
	euler(0, 0);

	vector<int> occourence(N, -1);
	vector<int> linkedList(ep.size(), -1);
	iota(linkedList.begin(), linkedList.end(), 1);
 
	for (int i = 0; i < ep.size(); i++)
	{
		int value = ep[i];
 
		if (occourence[value] != -1)
		{
			int j = linkedList[occourence[value]];
			linkedList[occourence[value]] = i + 1;
 
			for (; j < i; j = linkedList[j])
			{
				cout << ep[j] + 1 << ' ';
				occourence[ep[j]] = -1;
			}
			cout << ep[i] + 1 << '\n';
			continue;
		}
		
		occourence[value] = i;
	} 
	return 0;
}

Compilation message

postmen.cpp: In function 'void euler(int, int)':
postmen.cpp:15:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for (int i = start[i]; i < adj[index].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~~~~
postmen.cpp: In function 'int main()':
postmen.cpp:45:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for (int i = 0; i < ep.size(); i++)
      |                  ~~^~~~~~~~~~~
postmen.cpp: In function 'void euler(int, int)':
postmen.cpp:15:11: warning: 'i' is used uninitialized in this function [-Wuninitialized]
   15 |  for (int i = start[i]; i < adj[index].size(); i++)
      |           ^

Subtask #1
0 / 38.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 41308 KB Some edges were not used
2 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 41308 KB Some edges were not used
2 Halted 0 ms 0 KB -

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 41304 KB Some edges were not used
2 Halted 0 ms 0 KB -