제출 #40417

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
40417		Pajaraja	Pipes (CEOI15_pipes)	C++14	10 / 100	3325 ms	65536 KiB

pipes

#include <bits/stdc++.h>
using namespace std;
vector<int> g[100007];
int d[100007],minx[100007];
void dfs(int s,int du,int f)
{
	minx[s]=10000007;
	d[s]=du;
	for(int i=0;i<g[s].size();i++) if(f!=g[s][i])
	{
		if(d[g[s][i]]==-1)
		{
			dfs(g[s][i],du+1,s);
			if(minx[g[s][i]] > du) printf("%d %d\n",s,g[s][i]);
			minx[s]=min(minx[s],minx[g[s][i]]);
		}
		else minx[s]=min(minx[s],d[g[s][i]]); 
	}
}
int main()
{
	int n,m;
	fill(d,d+100007,-1);
	scanf("%d%d",&n,&m);
	for(int i=0;i<m;i++)
	{
		int t1,t2;
		scanf("%d%d",&t1,&t2);
		g[t1].push_back(t2);
		g[t2].push_back(t1);
	}
	for(int i=1;i<=n;i++) if(d[i]==-1) dfs(i,0,-1);
}

컴파일 시 표준 에러 (stderr) 메시지

pipes.cpp: In function 'void dfs(int, int, int)':
pipes.cpp:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[s].size();i++) if(f!=g[s][i])
              ~^~~~~~~~~~~~
pipes.cpp: In function 'int main()':
pipes.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
pipes.cpp:28:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&t1,&t2);
   ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
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• Subtask 10: 0 / 10