QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#328440 | #1844. Cactus | lefy | WA | 167ms | 68860kb | C++14 | 3.6kb | 2024-02-15 20:10:07 | 2024-02-15 20:10:07 |
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,top;
pair<int,int>st[N];
vector<int>b[N<<1];
void Tarjan(int x){
dfn[x]=low[x]=++idd;
// if(x==968||x==14118||x==7310)cout<<x<<"\n";
for(int v:e[x])if(!vis[v]){
if(!dfn[v]){
st[++top]={x,v};
Tarjan(v);
low[x]=min(low[x],low[v]);
if(low[v]>=dfn[x]){
// cout<<x<<" "<<v<<"*\n";
dcc++;int y=0;
b[dcc+n].push_back(x);b[x].push_back(dcc+n);
du[x]++,du[dcc+n]++;
while(1){
y=st[top--].second;
// cout<<y<<" ";
// if(x==968)cout<<y<<"*\n";
b[y].push_back(dcc+n),b[dcc+n].push_back(y);
du[y]++,du[dcc+n]++;
if(st[top+1]==make_pair(x,v))break;
}
// if(x==968)cout<<dcc<<"\n";
// cout<<x<<"\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[968]<<" "<<du[14118]<<"\n";
// for(int v:e[968])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;
int sz=b[x].size();
tmp=b[x][0];
for(int i=1;i<sz;i+=2)if(sz-i==3){
if(i!=1)
ans.push_back(b[x][sz-1]),
ans.push_back(b[x][sz-2]+n),
ans.push_back(b[x][sz-3]+n),
ans.push_back(b[x][sz-3]),
ans.push_back(b[x][sz-1]+n);
else ans.push_back(b[x][sz-1]),
ans.push_back(b[x][sz-2]+n),
ans.push_back(b[x][sz-1]+n),
ans.push_back(b[x][sz-3]),
ans.push_back(b[x][sz-3]+n);
break;
}else{
if(b[x][i]==56967||b[x][i+1]==56967)cout<<b[x][i]<<"\n";
// if(i+1>=sz)cout<<hav[x][0]<<" "<<hav[x][1]<<" "<<sz<<" "<<x<< "\n";
if(i==1)ans.push_back(b[x][i]),ans.push_back(b[x][i+1]+n),ans.push_back(b[x][i+1]),ans.push_back(b[x][i]+n);
else ans.push_back(b[x][i+1]),ans.push_back(b[x][i]),ans.push_back(b[x][i]+n),ans.push_back(b[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
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 8ms
memory: 52732kb
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: 52532kb
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: 167ms
memory: 68860kb
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:
56967 0 454464 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...
result:
wrong answer Integer parameter [name=m'] equals to 56967, violates the range [0, 0]