Submission #1694027

---

Source Code Expand

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+10;
int n,m,q[N],size;
vector<int> e[N];
bool vis[N];
void dfs(int x){
	q[++size]=x;vis[x]=1;
	int cnt=0;
	for (int i=0;i<e[x].size();i++)
	if (!vis[e[x][i]]&&!cnt) dfs(e[x][i]),cnt++;
}
int main()
{
	scanf("%d%d",&n,&m);
	for (int i=1;i<=m;i++){
		int u,v;
		scanf("%d%d",&u,&v);
		e[u].push_back(v);
		e[v].push_back(u);
	}
	dfs(1);
	reverse(q+1,q+size+1);
	size--;
	dfs(1);
	printf("%d\n",size);
	for (int i=1;i<=size;i++) printf("%d ",q[i]);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:15:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:18:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&u,&v);
                      ^

Judge Result