oj.uz

Submission #115963

# Submission time Handle Problem Language Result Execution time Memory
115963 2019-06-10T04:59:45 Z Mahdi_Jfri Senior Postmen (BOI14_postmen) C++14
0 / 100
 151 ms 262148 KB 
#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define pb push_back

const int maxn = 5e5 + 20;

vector<int> path;
stack<int> adj[maxn];

int from[maxn] , to[maxn];

bool visited[maxn];

void dfs(int v)
{
	while(!adj[v].empty())
	{
		int e = adj[v].top() , u = from[e] ^ to[e] ^ v;
		adj[v].pop();

		if(visited[e])
			continue;

		visited[e] = 1;
		dfs(u);
	}
	path.pb(v);
}

int main()
{
	int n , m;
	scanf("%d%d", &n, &m);

	for(int i = 0; i < m; i++)
	{
		int a , b;
		scanf("%d%d", &a, &b);
		a-- , b--;

		adj[a].push(i);
		adj[b].push(i);

		from[i] = a , to[i] = b;
	}

	path.reserve(1 << 20);

	dfs(0);

	vector<int> tmp;
	tmp.reserve(1 << 20);
	memset(visited , 0 , sizeof visited);
	for(auto v : path)
	{
		if(visited[v])
		{
			while(tmp.back() != v)
			{
				printf("%d ", tmp.back() + 1);
				visited[tmp.back()] = 0;
				tmp.pop_back();
			}
			tmp.pop_back();
			printf("%d\n", v + 1);
		}

		tmp.pb(v);
		visited[v] = 1;
	}
}

Compilation message

postmen.cpp: In function 'int main()':
postmen.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
postmen.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 38.0

# Verdict Execution time Memory Grader output
1 Runtime error 143 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Runtime error 139 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Runtime error 151 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -