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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#328369 | #1844. Cactus | lefy | WA | 111ms | 84664kb | C++14 | 3.1kb | 2024-02-15 19:38:35 | 2024-02-15 19:38:36 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int N=6e5+10;
vector<int>e[N];
void add(int u,int v){
e[u].push_back(v);
}
vector<int>ans;
int du[N<<1],n,m,vis[N];
void solve1(){
queue<int>q;
for(int i=1;i<=n;i++)if(du[i]&1)q.push(i);
while(!q.empty()){
int x=q.front();q.pop();
if(vis[x]||du[x]%2==0)continue;
vis[x]=1;du[x]=0;
for(int v:e[x])if(!vis[v]){
du[v]--;
if(du[v]&1)q.push(v);
}
ans.push_back(x);
}
}
int dcc,be[N],dfn[N],low[N],idd,st[N],top;
vector<int>b[N<<1],hav[N];
void Tarjan(int x){
st[++top]=x;dfn[x]=low[x]=++idd;
int tp=top;
if(x==89||x==155249||x==71561)cout<<x<<"\n";
for(int v:e[x])if(!vis[v]){
if(!dfn[v]){
Tarjan(v);
low[x]=min(low[x],low[v]);
if(low[v]>=dfn[x]){
dcc++;int y=0;
b[dcc+n].push_back(x);b[x].push_back(dcc+n);
du[x]++,du[dcc+n]++;hav[dcc].push_back(x);
while(top>tp){
y=st[top--];hav[dcc].push_back(y);if(x==71561)cout<<y<<"*\n";
b[y].push_back(dcc+n),b[dcc+n].push_back(y);
du[y]++,du[dcc+n]++;
}
}
}else low[x]=min(low[x],dfn[v]);
}
}
void solve2(){
ans.push_back(-1);int sz=ans.size();
for(int i=0;i<sz-1;i++)ans.push_back(ans[i]);
if(n>1000){
// cout<<du[89]<<" "<<du[155249]<<"\n";
// for(int v:e[155249])if(!vis[v])cout<<v<<"\n";
}
memset(du,0,sizeof(du));
for(int i=1;i<=n;i++)if(!vis[i]&&!dfn[i])Tarjan(i);
queue<int>q;for(int i=1;i<=n+dcc;i++)if(du[i]==1)q.push(i);
int tmp=0;
while(!q.empty()){
int x=q.front();q.pop();
for(int v:b[x]){
du[v]--;
if(du[v]==1)q.push(v);
}
if(x<=n)continue;x-=n;
int sz=hav[x].size();
tmp=hav[x][0];
for(int i=1;i<sz;i+=2)if(sz-i==3){
ans.push_back(hav[x][sz-1]);
ans.push_back(hav[x][sz-2]+n);
ans.push_back(hav[x][sz-3]+n);
ans.push_back(hav[x][sz-3]);
if(i==1)ans.push_back(hav[x][sz-2]);
ans.push_back(hav[x][sz-1]+n);
}else{
if(i+1>=sz)cout<<hav[x][0]<<" "<<hav[x][1]<<"\n";
if(i==1)ans.push_back(hav[x][i]),ans.push_back(hav[x][i+1]+n),ans.push_back(hav[x][i+1]),ans.push_back(hav[x][i]+n);
else ans.push_back(hav[x][i+1]),ans.push_back(hav[x][i]),ans.push_back(hav[x][i]+n),ans.push_back(hav[x][i+1]+n);
}
}
ans.push_back(tmp);
}
int main() {
scanf("%d%d",&n,&m);
for(int i=1;i<=m;i++){
int x,y;
scanf("%d%d",&x,&y);
add(x,y),add(y,x);
du[x]++,du[y]++;
}
solve1();
if(ans.size()!=n)solve2();
printf("0 %d\n",(int)ans.size());
for(int x:ans){
if(n<=1000){
if(x==-1)printf("2\n");
else if(x<=2*n)printf("1 %d\n",x);
}else if(x>2*n)cout<<x<<"**\n";
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 8ms
memory: 68240kb
input:
3 3 1 2 1 3 2 3
output:
0 6 2 1 3 1 5 1 2 1 6 1 1
result:
ok You are right!
Test #2:
score: 0
Accepted
time: 7ms
memory: 66284kb
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 3 1 9 1 2 1 10 1 1
result:
ok You are right!
Test #3:
score: -100
Wrong Answer
time: 111ms
memory: 84664kb
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:
89 71561 155249 209953* 183549* 155249* 286686* 186115* 89 71561 126 7488 555 53547 656 91746 707 10165 839 39861 1192 39918 1259 11675 1312 68728 1508 42217 1640 142133 1768 82434 1828 131298 1913 84603 2071 133434 2680 10322 2712 78356 3130 67057 3170 252441 3489 128486 3651 141773 3652 158748 369...
result:
wrong answer Integer parameter [name=m'] equals to 89, violates the range [0, 0]