제출 #34368

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
34368		bnahmad15	Pipes (CEOI15_pipes)	C++14	0 / 100	5072 ms	65536 KiB

pipes

#include <bits/stdc++.h>
using namespace std;

int n,m,cant,target;
bool flag;
vector <pair<int,int> > adj[1000];
vector<int> u,v;
bool vis[1000]={false};

void check(int node){
	if (node == target){
		flag = true;
		return;
	}
	vis[node]=true;
	for (auto i : adj[node]){
		if (i.second == cant)
			continue;
		if (vis[i.first])
			continue;
		check(i.first);
	}
	vis[node]=false;
}
int main(){

	scanf("%d%d",&n,&m);
	u.resize(m);
	v.resize(m);
	for (int i =0 ;i <m;i++){
		scanf("%d%d",&u[i],&v[i]);
		adj[u[i]].push_back({v[i],i});
		adj[v[i]].push_back({u[i],i});
	}
	for (int i = 0; i<m; i++){
		cant = i;
		target = v[i];
		flag = false;
		check(u[i]);
		if (!flag){
			cout<<u[i]<<" "<<v[i]<<endl;
		}
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

pipes.cpp: In function 'int main()':
pipes.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
pipes.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&u[i],&v[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~

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