Submission #1353531

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Source Code Expand

#include<bits/stdc++.h>

int n,m,s,t;

int to[200005],nxt[200005],fst[100005],tot;
void add(int u,int v)
{
    to[++tot]=v;
    nxt[tot]=fst[u];
    fst[u]=tot;
}

bool vis[100005];
int q[200005],l,r;

void extend(int u,int &p,int d)
{
    vis[q[p+=d]=u]=1;
    for(int e=fst[u],v;e;e=nxt[e])
	if(!vis[v=to[e]]){extend(v,p,d);return;}
}

int main()
{
    scanf("%d%d",&n,&m);
    for(int e=1;e<=m;++e)
    {
	scanf("%d%d",&s,&t);
	add(s,t),add(t,s);
    }

    vis[s]=vis[t]=1;
    extend(s,l=100001,-1);
    extend(t,r=100000,1);

    printf("%d\n",r-l+1);
    for(int i=l;i<=r;++i)
	printf("%d ",q[i]);
    
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:25:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
./Main.cpp:28:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&s,&t);
                     ^

Judge Result