제출 #40442

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
40442		Pajaraja	Pipes (CEOI15_pipes)	C++14	50 / 100	601 ms	13400 KiB

pipes

#include <bits/stdc++.h>
using namespace std;
vector<unsigned short> g[30007];
unsigned short d[30007];
unsigned short dfs(int s,int du,int f)
{
	unsigned short x=30008;
	d[s]=du;
	int cnt=0;
	for(int i=0;i<g[s].size();i++)
	{
		if(cnt==0 && g[s][i]==f)
		{
			cnt++;
			continue;
		}
		if(d[g[s][i]]==30008)
		{
			unsigned short y=dfs(g[s][i],du+1,s);
			if(y>du) printf("%d %d\n",s,g[s][i]);
			x=fmin(x,y);
		}
		else x=fmin(x,d[g[s][i]]); 
	}
	return x;
}
int main()
{
	int n,m;
	fill(d,d+30007,30008);
	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]==30008) dfs(i,0,-1);
}

컴파일 시 표준 에러 (stderr) 메시지

pipes.cpp: In function 'short unsigned int dfs(int, int, int)':
pipes.cpp:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[s].size();i++)
              ~^~~~~~~~~~~~
pipes.cpp: In function 'int main()':
pipes.cpp:31:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
pipes.cpp:35:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&t1,&t2);
   ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10