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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#327868 | #1844. Cactus | czc | WA | 97ms | 52604kb | C++14 | 2.2kb | 2024-02-15 15:09:16 | 2024-02-15 15:09:17 |
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];
int tot,fl[N];
vector<int> path[N];
int r[N],vis[N];
vector<int> op1,op2;
vector<int> bl[N];
int fa[N],dep[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;
tot++;
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)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);
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];
for(int v:bl[w]){
r[v]--;
if(r[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;
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 36788kb
input:
3 3 1 2 1 3 2 3
output:
0 6 2 1 2 1 4 1 1 1 5 1 6
result:
ok You are right!
Test #2:
score: 0
Accepted
time: 3ms
memory: 35444kb
input:
7 7 1 2 1 3 2 3 2 4 2 5 3 6 3 7
output:
0 14 1 4 1 5 1 6 1 7 2 1 4 1 5 1 6 1 7 1 2 1 8 1 1 1 9 1 10
result:
ok You are right!
Test #3:
score: -100
Wrong Answer
time: 97ms
memory: 52604kb
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 476008 1 3 1 8 1 9 1 10 1 11 1 16 1 20 1 21 1 25 1 28 1 29 1 30 1 32 1 33 1 34 1 41 1 42 1 43 1 44 1 47 1 48 1 53 1 54 1 55 1 57 1 59 1 62 1 65 1 73 1 75 1 77 1 80 1 81 1 87 1 88 1 94 1 95 1 101 1 102 1 103 1 106 1 112 1 123 1 128 1 129 1 133 1 136 1 137 1 138 1 140 1 141 1 143 1 145 1 146 1 150 1...
result:
wrong answer The deg of 102092 is not odd.