Submission #31549

#	Time	Username	Problem	Language	Result	Execution time	Memory
31549		YoLo	Senior Postmen (BOI14_postmen)	C++14	38 / 100	1100 ms	22520 KiB

postmen

#include<bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define endl '\n'
#define N 100000
#define pi acos(-1)
#define tora acos(-1)/180
#define tode 180/acos(-1)
#define pque priority_queue
typedef pair < int, int > ii;
typedef vector < int > vi;
typedef vector < vi > vii;
int mod = 1000000007 ;
int check[500009], edge[500009], n, m, a, b, cak, x[500009], y[500009];
vi v[500009];
stack<int> st;
void dfs(int u)
{
	//cout << u << endl;
	if(check[u] == 1)
	{
		if(cak == 1)
			printf("\n");
		printf("%d", u);
		while(!st.empty() && st.top() != u)
		{
			int id = st.top();
			printf(" %d", id);
			check[id] = 0;
			st.pop();
			if(id == u)
				break;
		}
		cak = 1;
	}
	else
	{
		check[u] = 1;
		st.push(u);
	}
	for(int i = 0; i < (int)v[u].size(); i++)
		if(edge[v[u][i]] == 0 && check[u] == 1)
		{
			edge[v[u][i]] = 1;
			if(x[v[u][i]] != u)
				dfs(x[v[u][i]]);
			else
				dfs(y[v[u][i]]);
		}
}
int main()
{
	//ios_base::sync_with_stdio(0);
	cin >> n >> m;
	for(int i = 1; i <= m; i++)
	{
		scanf("%d%d", &x[i], &y[i]);
		v[x[i]].pb(i);
		v[y[i]].pb(i);
	}
	for(int i = 1; i <= n; i++)
		dfs(i);
}

Compilation message (stderr)

postmen.cpp: In function 'int main()':
postmen.cpp:60:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &x[i], &y[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 38 / 38
• Subtask 2: 0 / 17
• Subtask 3: 0 / 45