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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#328086 | #1844. Cactus | Jryno1 | WA | 16ms | 144452kb | C++14 | 2.3kb | 2024-02-15 16:59:17 | 2024-02-15 16:59:17 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int maxn=2e6+10;
#define pii pair<int,int>
#define fi first
#define se second
#define mkp(x,y) make_pair(x,y)
vector<int>ed[maxn],lp[maxn],bel[maxn];
int del[maxn],deg[maxn],n,m,vis[maxn],dfn[maxn],sta[maxn],tp,cdfn;
int clp,nd[maxn],siz[maxn];
void dfs(int x,int pre){
dfn[x]=++cdfn,sta[++tp]=x;
for(auto v:ed[x]){
if(del[v]||v==pre)continue;
if(!dfn[v])dfs(v,x);
else if(dfn[v]<dfn[x]){
clp++;
for(int i=tp;;i--){//O(m)
lp[clp].push_back(sta[i]);
bel[sta[i]].push_back(clp);
siz[sta[i]]++;
if(sta[i]==v)break;
}
}
}
tp--;
}
vector<pii>ans;
int main(){
cin.tie(0),cout.tie(0),ios::sync_with_stdio(false);
cin>>n>>m;
for(int i=1;i<=m;i++){
int u,v;
cin>>u>>v;
ed[u].push_back(v);
ed[v].push_back(u);
deg[u]++,deg[v]++;
}
queue<int>Q;
for(int i=1;i<=n;i++)if(deg[i]&1)Q.push(i);
while(!Q.empty()){
int now=Q.front();
Q.pop();
if(del[now]||!(deg[now]&1))continue;
ans.push_back(mkp(1,now));
del[now]=1;
for(auto v:ed[now])deg[v]--,Q.push(v);
}
ans.push_back(mkp(2,-1));
for(int i=1;i<=n;i++)if(del[i])ans.push_back(mkp(1,i));
for(int i=1;i<=n;i++)if(!del[i]&&!dfn[i])dfs(i,0);
cout<<clp<<endl;
for(int i=1;i<=n;i++){
if(bel[i].size()>1)for(auto v:bel[i])nd[v]++;
}
for(int i=1;i<=clp;i++)if(nd[i]<=1)Q.push(i);
while(!Q.empty()){
int V=Q.front();
Q.pop();
if(vis[V])continue;
vis[V]=1;
int S;
if(nd[V]==0)S=0;
else for(int i=0;i<lp[V].size();i++)if(siz[lp[V][i]]>1)S=i;
vector<int>R;
R.push_back(lp[V][S]);
for(int i=S+1;i<lp[V].size();i++)R.push_back(lp[V][i]);
for(int i=0;i<S;i++)R.push_back(lp[V][i]);
for(int i=1,o=1;i<R.size();i++,o^=1){
if(o)ans.push_back(mkp(1,R[i]));
else ans.push_back(mkp(1,R[i]+n));
}
if(R.size()>1)ans.push_back(mkp(1,R[1]+n));
if(R.size()>2){
if((R.size()-1)&1)ans.push_back(mkp(1,R[R.size()-1]+n));
else ans.push_back(mkp(1,R[R.size()-1]));
}
if(siz[R[0]]==1){
ans.push_back(mkp(1,R[0]));
} else {
siz[R[0]]--;
if(siz[R[0]]==1){
for(auto v:bel[R[0]]){
nd[v]--;
if(nd[v]<1&&!vis[v])Q.push(v);
}
}
}
}
cout<<0<<" "<<ans.size()<<"\n";
for(auto v:ans){
if(v.fi==1)cout<<v.fi<<" "<<v.se<<"\n";
else cout<<v.fi<<"\n";
}
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 16ms
memory: 144452kb
input:
3 3 1 2 1 3 2 3
output:
1 0 6 2 1 2 1 4 1 5 1 1 1 3
result:
wrong answer Integer parameter [name=m'] equals to 1, violates the range [0, 0]