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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#327888 | #1844. Cactus | xztmax67 | WA | 255ms | 51176kb | C++14 | 2.0kb | 2024-02-15 15:19:08 | 2024-02-15 15:19:08 |
Judging History
answer
#include<bits/stdc++.h>
#define pii pair<int,int>
#define fi first
#define se second
#define mk make_pair
#define pb push_Back
using namespace std;
const int N=6e5+100;
int n,m;
vector<int>ans,g[N],G[N];
int vis[N],deg[N];
void dfs(int x)
{
vis[x]=2;ans.push_back(x);deg[x]=0;
for(auto y:g[x])if(vis[y]!=2)deg[y]^=1;
for(auto y:g[x])if(vis[y]!=2&°[y])dfs(y);
}
int dfn[N],low[N],dfntot,scc;
stack<int>st;
void tarjan(int x)
{
dfn[x]=low[x]=++dfntot;st.push(x);
for(auto y:G[x])
{
if(!dfn[y])
{
tarjan(y);low[x]=min(low[x],low[y]);if(low[y]>=dfn[x])
{
scc++;
while(st.top()!=x){g[scc].push_back(st.top());g[st.top()].push_back(scc);st.pop();};
g[scc].push_back(x);g[x].push_back(scc);
}
}
else low[x]=min(low[x],dfn[y]);
}
}
void dfs(int x,int fa)
{
vis[x]=1;
for(auto y:g[x])if(y!=fa)dfs(y,x);
// cout<<x<<" "<<fa<<endl;
if(x<=n)return;
int p=0,sz=g[x].size();
for(int i=0;i<sz;i++)if(g[x][i]==fa)p=i;else vis[g[x][i]]=2;
// for(auto y:g[x])cout<<y<<' ';cout<<endl;
for(int i=1;i<sz;i++)
if(i&1)ans.push_back(g[x][(p+i)%sz]);
else ans.push_back(g[x][(p+i)%sz]+n);
if(sz&1)ans.push_back(g[x][(p+1)%sz]+n),ans.push_back(g[x][(p-1+sz)%sz]);
else ans.push_back(g[x][(p+1)%sz]+n),ans.push_back(g[x][(p-1+sz)%sz]+n);
}
signed main()
{
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n>>m;scc=n;
for(int i=1,x,y;i<=m;i++)cin>>x>>y,g[x].push_back(y),g[y].push_back(x),deg[x]^=1,deg[y]^=1;
for(int i=1;i<=n;i++)if(deg[i])dfs(i);
for(int x=1;x<=n;x++)for(auto y:g[x])if(vis[x]!=2&&vis[y]!=2)G[x].push_back(y);
for(int i=1;i<=n;i++)g[i].clear();
for(int i=1;i<=n;i++)if(G[i].size()&1)puts("SB");
for(int i=1;i<=n;i++)if(!dfn[i])tarjan(i);
memset(vis,0,sizeof(vis));
int t=ans.size();
ans.push_back(0);
for(int i=1;i<=n;i++)if(!vis[i])dfs(i,0);
for(int i=1;i<=n;i++)if(vis[i]!=2)ans.push_back(i);
cout<<0<<" "<<ans.size()<<endl;
for(auto x:ans)if(!x)cout<<2<<endl;else cout<<1<<" "<<x<<endl;
return 0;
}
/*
6 6
1 2
2 3
3 4
4 5
5 6
6 1
*/
Details
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Test #1:
score: 100
Accepted
time: 5ms
memory: 34108kb
input:
3 3 1 2 1 3 2 3
output:
0 6 2 1 3 1 5 1 6 1 2 1 1
result:
ok You are right!
Test #2:
score: 0
Accepted
time: 3ms
memory: 34032kb
input:
7 7 1 2 1 3 2 3 2 4 2 5 3 6 3 7
output:
0 13 1 4 1 2 1 1 1 6 1 3 2 1 1 1 2 1 3 1 4 1 5 1 6 1 7
result:
ok You are right!
Test #3:
score: -100
Wrong Answer
time: 255ms
memory: 51176kb
input:
300000 368742 1 143504 1 234282 2 91276 2 296320 3 274816 4 212293 4 258214 5 253489 5 295826 6 96521 6 252745 6 267103 6 269879 7 5293 7 295586 8 44304 8 57067 8 233291 9 190526 10 18682 11 7440 12 24695 12 172561 12 243692 12 280316 13 80152 13 268749 14 146394 14 207280 15 151280 15 226848 16 458...
output:
0 521873 1 3 1 274816 1 273658 1 217572 1 248509 1 231418 1 73094 1 117739 1 11855 1 48428 1 55953 1 121689 1 234392 1 181317 1 238712 1 77369 1 105062 1 6838 1 130659 1 8 1 44304 1 9 1 10 1 18682 1 63155 1 148043 1 194189 1 26612 1 1155 1 31020 1 108936 1 71065 1 77412 1 124995 1 126920 1 53663 1 4...
result:
wrong answer The deg of 453816 is not odd.