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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#327918 | #1844. Cactus | czc | WA | 10ms | 32140kb | C++14 | 2.2kb | 2024-02-15 15:31:16 | 2024-02-15 15:31:16 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;using ll=long long;
int rd(int x=0,char c=getchar()){while(!isdigit(c))c=getchar();while(isdigit(c))x=x*10+(c^48),c=getchar();return x;}
const int N=3e5+5;
int n,m;
vector<int> E[N],G[N],path[N];;
int tot,fl[N];
int r[N],vis[N];
vector<int> op1,op2,bl[N];
int fa[N],dep[N],nd[N];
void dfs(int u){
dep[u]=dep[fa[u]]+1;
for(int v:G[u]){
if(v==fa[u])continue;
if(dep[v]){
if(dep[v]>dep[u])continue;
path[++tot].push_back(u);
while(path[tot].back()!=v)path[tot].push_back(fa[path[tot].back()]);
}else fa[v]=u,dfs(v);
}
}
int main(){
n=rd(),m=rd();
for(int i=1;i<=m;i++){
int u=rd(),v=rd();
E[u].push_back(v);
E[v].push_back(u);
r[u]++,r[v]++;
}queue<int> q;
for(int i=1;i<=n;i++)if(r[i]&1)q.push(i);
while(q.size()){
int u=q.front();q.pop();
if(r[u]%2==0||vis[u])continue;
op1.push_back(u);vis[u]=1;
for(int v:E[u]){
r[v]--;
if((r[v]&1)&&!vis[v])q.push(v);
}
}if(op1.size()==n){
printf("0 %d\n",(int)op1.size());
for(int x:op1)printf("1 %d\n",x);
return 0;
}
for(int i=1;i<=n;i++)if(!vis[i]){
r[i]=0;
for(int j:E[i])if(!vis[j])G[i].push_back(j);
}for(int i=1;i<=n;i++)if(vis[i])op2.push_back(i);
for(int i=1;i<=n;i++)if(!dep[i])dfs(i);
for(int i=1;i<=n;i++)for(int j:G[i])r[j]++;
for(int i=1;i<=tot;i++){
int c=0;
for(int x:path[i])if(r[x]>2)c++;
for(int x:path[i])
bl[x].push_back(i);
nd[i]=c;
if(c<=1)q.push(i),fl[i]=1;
}while(q.size()){
int u=q.front();q.pop();
int p=0,l=path[u].size();
for(int i=0;i<l;i++)if(r[path[u][i]]>2)p=i;
int nw=(p+1)%l;
for(int i=0;i<l-1;i++){
op2.push_back(path[u][nw]+(i&1)*n);
nw=(nw+1)%l;
}
if(l&1){
// op2.push_back(path[u][(p-1+l)%l]);
// op2.push_back(path[u][(p+1)%l]+n);
// op2.push_back(path[u][p]+n);
}else{
// op2.push_back(path[u][p]+n);
}
if(r[path[u][p]]>2){
int w=path[u][p];
r[w]-=2;
if(r[w]>2)continue;
for(int v:bl[w]){
nd[v]--;
if(nd[v]<=1&&!fl[v])q.push(v),fl[v]=1;
}
}
}
printf("0 %d\n",(int)(op1.size()+op2.size())+1);
for(int x:op1)printf("1 %d\n",x);
puts("2");
for(int x:op2)printf("1 %d\n",x);
return 0;
}
詳細信息
Test #1:
score: 0
Wrong Answer
time: 10ms
memory: 32140kb
input:
3 3 1 2 1 3 2 3
output:
0 3 2 1 2 1 4
result:
wrong answer The number of remaining edges is not equal to m'.