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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#328518 | #1844. Cactus | lefy | WA | 167ms | 63648kb | C++14 | 2.7kb | 2024-02-15 20:38:27 | 2024-02-15 20:38:28 |
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;
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]){
dcc++;int y=0;
b[dcc+n].push_back(x);b[x].push_back(dcc+n);
while(1){
y=st[top--].second;
b[y].push_back(dcc+n),b[dcc+n].push_back(y);
if(st[top+1]==make_pair(x,v))break;
}
}
}else low[x]=min(low[x],dfn[v]);
}
}
void dfs(int x,int fa){
vis[x]=1;
for(int v:b[x])if(v!=fa)dfs(v,x);
if(x<=n)return;
int sz=b[x].size();
for(int i=1;i<sz;i+=2)if(sz-i==3){
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);
if(i!=1)swap(ans[ans.size()-1],ans[ans.size()-2]);
break;
}else{
// if(b[x][i]==147636||b[x][i+1]==147636)cout<<b[x][i+1]<<" "<<b[x][0]<<"\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);
}
}
void solve2(){
ans.push_back(-1);int sz=ans.size();
for(int i=0;i<sz-1;i++)ans.push_back(ans[i]);
for(int i=1;i<=n;i++)if(!vis[i]&&!dfn[i])Tarjan(i);
for(int i=1;i<=dcc;i++)if(!vis[n+i]){
if(n>=1000)cout<<i<<"\n";
dfs(n+i,0);
ans.push_back(b[n+i][0]);
}
}
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());
int flag=0;
for(int x:ans){
if(x==-1)printf("2\n");
else printf("1 %d\n",x);
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 6ms
memory: 46052kb
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: 10ms
memory: 45980kb
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: 63648kb
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:
1 3 5 6 7 9 10 13 14 15 16 18 21 23 29 32 35 42 43 46 48 49 50 51 53 54 55 56 57 58 59 61 62 64 65 66 67 72 76 86 87 90 91 92 93 94 97 101 102 103 106 108 110 111 115 117 118 120 121 130 131 132 133 134 135 137 138 139 143 155 156 158 165 173 176 177 180 183 185 188 196 197 198 206 210 211 213 217 2...
result:
wrong answer Integer parameter [name=m'] equals to 1, violates the range [0, 0]